CN115603901B - A key updating method, device, acquisition terminal device and storage medium - Google Patents

Abstract

The present invention discloses a key updating method, device, acquisition terminal equipment and computer-readable storage medium, and relates to the electric power field, wherein the method comprises: receiving key updating task parameters and table file information; sending an execution instruction for setting a table key according to the key updating task parameters and the table file information; setting the table key according to the execution instruction and receiving returned execution data; sending an operation instruction for reading CRC of the table key according to the execution data; reading the CRC of the table key according to the operation instruction and receiving returned read data; performing CRC verification according to the read data to complete the key updating; the present invention ensures that the functions of executing key updating are performed concurrently without interfering with each other by operating in the acquisition terminal, thereby realizing functional decoupling, and the key updating is verified by CRC verification in the present invention, so as to ensure that the electric energy meter completes the key updating.

Description

A method and device for updating a secret key, a collection terminal device and a storage medium

Technical Field

The present invention relates to the electric power field, and in particular to a key updating method, device, acquisition terminal equipment and computer-readable storage medium.

Background Art

In the power industry data collection system, there are three parts: the system master station, the data collection terminal, and the energy meter. The system master station can read and write parameters, read data, and control the energy meter through the data collection terminal or the data collection terminal itself. Its communication exists in the form of messages. For the sake of completeness, the messages are often encrypted data. Among them, the encryption of data requires a secret key. All energy meters can share a secret key, or each meter can have a different secret key. In order to improve the security of the use of the secret key, the secret key can be changed at any time.

There are currently two methods for updating the secret key. One is that the system master station sets the new secret key to each energy meter through the acquisition terminal. The energy meter returns the result of the setting, and the system master station updates the status display on the interface according to the returned result. This method of using the system master station to directly update the secret key of the energy meter will cause the system master station's resources to be occupied all the time, and other functions on the master station will be affected. In addition, the communication involves the system master station, the acquisition terminal, and the energy meter at three levels, which increases the communication time of a message and slows down the response of the entire system.

The other is that the system master sends the energy meter information and secret key to be updated to the collection terminal, and the collection terminal executes the secret key update task, and then reports the result to the system master, and the system master updates the status of the interface. However, according to the current collection terminals of major manufacturers, basically all energy meter secret key update functions are executed using one task. As for the high-speed carrier communication solutions currently used in the market, there is no concurrent function, and the overall communication speed is not reasonably utilized. Moreover, after setting the secret key, since the secret key is in write-only mode, it is not possible to confirm whether the setting is successful by reading the secret key. It is considered that the setting is successful only through the confirmation returned by the energy meter, and it is not confirmed again by other means, so it is impossible to determine whether the setting is successful.

Summary of the invention

The purpose of the present invention is to provide a key update method, device, acquisition terminal equipment and computer-readable storage medium. The present invention ensures that the functions of executing key updates are performed concurrently without interfering with each other by operating in the acquisition terminal, thereby realizing functional decoupling. In addition, the key update is verified by CRC check in the present invention, which can ensure that the electric energy meter truly completes the key update.

According to one aspect of the present invention, the present invention provides a key update method, which is applied to a collection terminal, comprising:

A method for updating a secret key, characterized in that it is applied to a collection terminal and comprises:

Receive key update task parameters and table file information;

Sending an execution instruction for setting a table key according to the key update task parameters and the table archive information;

According to the execution instruction, setting the table key and receiving returned execution data;

According to the execution data, sending an operation instruction for reading the CRC of the table key;

According to the operation instruction, read the CRC of the table key and receive the returned read data;

According to the read data, CRC verification is performed to complete the key update.

Optionally, the sending of the execution instruction for setting the table key includes:

Check whether the strategy execution temporary area has the operation instruction;

If there is the operation instruction, sending the operation instruction;

If there is no such operation instruction, then checking whether the strategy execution queue contains the aforementioned execution data;

If the execution data exists, generating and sending the operation instruction according to the extracted execution data;

If the execution data does not exist, the policy extractor is used to generate the execution instruction for setting the table key, and the execution instruction is sent.

Optionally, if the operation instruction is present, after sending the operation instruction, the method further includes:

Check whether the sending is successful;

If the sending is successful, the policy execution temporary area is cleared;

If the sending is unsuccessful, the policy execution temporary area will not be cleared and the sending will continue after waiting for a preset time.

Optionally, after generating and sending the operation instruction according to the extracted execution data, the method further comprises:

If the number of instructions in the copy execution queue reaches a preset value, a generated operation instruction is stored in the strategy execution temporary area.

Optionally, sending an operation instruction for reading the CRC of the table key according to the execution data includes:

Determine whether the execution result is timeout;

If the execution result is a timeout, determining the number of executions;

If the execution times are less than a preset value, sending the execution instruction;

If the execution times are equal to the preset value, the failure event is reported to the system master station;

If the execution result is not a timeout, sending the operation instruction for reading the CRC of the table key.

Optionally, performing CRC verification according to the read data to complete the key update includes:

If the execution result is successful, the CRC verification is performed to complete the key update;

If the execution result is failure, the failure event is reported to the system master station.

Determine whether the execution result is a timeout;

If the execution result is a timeout, determining the number of executions;

If the execution times are less than a preset value, sending the operation instruction;

If the execution times are equal to the preset value, the failure event is reported to the system master station.

Optionally, performing CRC verification according to the read data to complete the key update includes:

Compare the CRC value of the table key with the CRC value of the key in the database to see if they match;

If they match, the result is sent to the system master station to complete the key update.

Optionally, sending an execution instruction for setting a table key according to the key update task parameter and the table archive information includes:

Comparing the key update task parameters with the table file information to see if they are consistent;

If they match, the electric energy meter for which the secret key is to be updated is determined and the execution instruction for setting the table secret key is sent.

The present invention provides a key updating device, comprising:

A receiving module, used to receive key update task parameters and table file information;

A first sending module, used for sending an execution instruction for setting a table secret key according to the secret key update task parameters and the table archive information;

A key setting module, used for setting the table key according to the execution instruction and receiving the returned execution data;

A second sending module, used for sending an operation instruction for reading the CRC of the table key according to the execution data;

A key reading module, used for reading the CRC of the table key and receiving returned read data according to the operation instruction;

The verification module is used to perform CRC verification based on the read data to complete the key update.

The present invention provides a collection terminal device, comprising:

Memory for storing computer programs;

A processor is used to implement the field conversion method as described above when executing the computer program.

The present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are loaded and executed by a processor, the steps of the key updating method as described above are implemented.

It can be seen that the present invention ensures that the functions of executing the key update are performed concurrently without interfering with each other by operating in the acquisition terminal, thereby realizing functional decoupling, and the key update is verified by CRC check in the present invention, which can ensure that the electric energy meter truly completes the key update. The present application also provides a key update device, an acquisition terminal device, and a computer-readable storage medium, which have the above-mentioned beneficial effects.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

FIG1 is a flowchart of an implementation method for updating a secret key provided by an embodiment of the present invention;

FIG2 is a flow chart of a key updating method provided by an embodiment of the present invention;

FIG3 is a specific flow chart of data transmission provided by an embodiment of the present invention;

FIG4 is a specific flow chart of data reception provided by an embodiment of the present invention;

FIG5 is a structural block diagram of a key updating device provided by an embodiment of the present invention;

FIG6 is a structural block diagram of a collection terminal device provided by an embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the power industry data collection system, there are three parts: the system master station, the data collection terminal, and the electric energy meter. The data collection terminal is installed under the transformer, and multiple electric energy meters are installed on the same power line. Generally, power carrier communication is used (the carrier module is a pluggable module that is plugged into the data collection terminal). And the data collection terminal is an intermediate media device, which is connected to the system master station on the top and the electric energy meter on the bottom. The system master station can read and write parameters, read data, and control the electric energy meter through the data collection terminal or the data collection terminal itself. Its communication exists in the form of messages. For the sake of completeness, the messages are often encrypted data.

The European market attaches great importance to the data encryption function, and more and more other markets are also gradually increasing the demand for data encryption. Data encryption requires a secret key. All electricity meters can share one secret key, or each meter can have a different secret key. In order to improve the security of the use of the secret key, the secret key can be changed at any time.

There are currently two methods for updating the secret key. One is that the system master station sets the new secret key to each electric energy meter through the collection terminal. The electric energy meter returns the result of the setting, and the system master station updates the status display on the interface according to the returned result. When the electric energy meter does not return, the system master station resends. After the number of resends is reached, the status display on the interface is updated according to the execution result. If the update is successful, the new secret key is used for communication. This method uses the system master station to directly update the secret key of the electric energy meter, which will cause the resources of the system master station to be occupied all the time, and other functions on the master station will be affected. For example, if the data or parameters of the collection terminal need to be read during the update process, the response will be much slower. Moreover, the communication involves three levels: the system master station, the collection terminal, and the electric energy meter, which increases the communication time of a message and slows down the response of the entire system.

The other is that the system master sends the energy meter information and secret key to be updated to the collection terminal, and the collection terminal executes the secret key update task, and then reports the result to the system master, and the system master updates the status of the interface. However, according to the current collection terminals of major manufacturers, basically all the energy meter secret key update functions are executed using one task. As for the high-speed carrier communication scheme currently used in the market, there is no concurrency, that is, multiple collection terminals can send messages to read the energy meter at the same time, such as the function of sending 15 messages at the same time, and the overall communication speed is not reasonably utilized. Moreover, after setting the secret key, since the secret key is in write-only mode (reading is not supported), it is not possible to confirm whether the setting is successful by reading the secret key. Only through the confirmation returned by the energy meter, it is considered that the setting is successful, and there is no other way to confirm again, and it is impossible to determine whether the setting is successful.

In view of this, the present invention provides a key update method, which ensures that the functions of executing the key update are performed concurrently without interfering with each other by operating in the acquisition terminal, thereby realizing functional decoupling. In addition, the key update is verified by CRC check in the present invention, which can ensure that the electric energy meter truly completes the key update.

For ease of understanding, the method for updating the secret key will first be briefly described. Please refer to Figure 1, which is an implementation flow chart of a secret key updating method provided by an embodiment of the present invention, and the method includes: the system master station sets the table file parameters and the secret key update task parameters and sends them to the acquisition terminal; the acquisition terminal replies with a confirmation frame, and after the system master station receives the confirmation frame, it reads the parameters for comparison to confirm whether the parameters are set successfully; the acquisition terminal executes the secret key update according to the parameters, and after the secret key update is completed, the event is reported to the system master station; after the system master station makes a judgment, it is displayed on the master station interface and replies with a confirmation frame; after receiving the confirmation frame, the acquisition terminal will no longer resend, otherwise it needs to resend until the master station replies with a confirmation frame; when the system master station receives the event of successful execution of the secret key update, the new secret key is enabled. It should be noted that data frame communications all carry frame sequence numbers, indicating the consistency of the sent and received frames.

The following is a detailed description, please refer to FIG. 2, which is a flow chart of a key update method provided by an embodiment of the present invention. A key update method according to an embodiment of the present invention, applied to a collection terminal, may include:

Step S101: receiving key update task parameters and table file information.

In the embodiment of the present invention, the meter file information is the file information of the electric energy meter, including the reading port number of the electric energy meter, the meter address and other electric energy meter information, and communication with the target electric energy meter can be achieved based on the file information, wherein the meter address is used to uniquely identify the electric energy meter.

In the embodiment of the present invention, the key update task parameters may include table address, CRC16 check value of the key and other information. It should be noted that the key is a string of HEX code, which can be 16 bytes or multiple bytes, and the embodiment of the present invention does not limit this. In the embodiment of the present invention, the CRC16 algorithm can be performed on the key to obtain a check value of a two-byte HEX code, where CRC is a cyclic redundancy check, which is the abbreviation of Cyclic Redundancy Che, and CRC16 is a check algorithm of CRC.

In the embodiment of the present invention, the table file information sent by the system master station can be received first, and communication with the electric energy meter can be achieved according to the table address and other information in the table file information, and then the key update task parameters sent by the system master station can be received to implement the key update operation of the electric energy meter.

Step S102: Sending an execution instruction for setting the table key according to the key update task parameters and the table file information.

In the embodiment of the present invention, the execution instruction includes the serial number of the electric energy meter that needs to update the secret key, the execution step, i.e., setting the table secret key, and the ID and other information, wherein the ID corresponds to the execution step, and the ID is the secret key tag, which is a data item, and the secret key content can be read from the database according to the ID. For example, there are N table archive information serial numbers, starting from 0, indicating that the first execution is the secret key update of the electric energy meter with serial number 0, the execution step is the secret key setting step, and the ID is ID1. It should be noted that the table archive information serial number is set by the system master station, and Nmax is used to represent the total number of table archive information serial numbers set by the system master station, wherein N is less than Nmax, and the value of Nman is generally less than 1024.

In the embodiment of the present invention, the electric energy meter to be updated with a secret key can be determined and an execution instruction for setting the table secret key can be sent by comparing the secret key update task parameters and the table file information to see whether they are consistent. It should be noted that the table address in the secret key update task parameters and the table address in the table file information can be compared to see whether they are consistent, or other information can be compared to see whether they are consistent, and the embodiment of the present invention does not limit this.

In the embodiment of the present invention, it is possible to preferentially detect whether there are operation instructions in the policy execution temporary area. If there are operation instructions, the operation instructions are sent. When there are no operation instructions, it is then detected whether the policy execution queue has execution data. If there are execution data, the operation instructions are generated and sent according to the extracted execution data, and the execution data is deleted from the policy execution queue. When there is no execution data, the policy extractor is used to generate an execution instruction for setting the table key, and the execution instruction is sent. It should be noted that the policy execution temporary area is used to store the operation instructions generated by the policy execution queue, and only one instruction content can be stored. The policy execution queue is used to store the returned execution data. Among them, the operation instruction contains information such as the required electric energy meter serial number, the execution step, i.e., the CRC of reading the table key, and the ID. The execution data is information such as the execution steps and execution results returned by the electric energy meter.

In the embodiment of the present invention, after sending the operation instruction, it can be detected whether the sending is successful. If the sending is successful, the policy execution temporary area is cleared. If the sending is unsuccessful, the policy execution temporary area is not cleared and the sending is continued after waiting for a preset time. In the embodiment of the present invention, there is no restriction on the value of the preset time, which can be preset by the designer, for example, to 20 seconds, or can be set according to the specific usage scenario.

In the embodiment of the present invention, the execution instruction and the operation instruction can be sent to the copy reading execution queue. It should be noted that if the number of instructions in the copy reading execution queue reaches the preset value when the operation instruction is sent, the generated operation instruction is stored in the policy execution temporary area, and after waiting for the preset time, the policy execution temporary area is detected to have data. If the number of instructions in the copy reading execution queue reaches the preset value when the execution instruction is sent, the policy extractor is exited after waiting for the preset time and the policy execution temporary area is detected to have data. If the preset value is not reached, the execution instruction is sent to the copy reading execution queue. For example, starting from sequence number 0, the message is sent to the copy reading execution queue one by one. After the sending is successful, the sequence number increases by 1. If the copy reading execution queue reaches the preset value, the sequence number remains unchanged, the policy extractor is exited and the policy execution temporary area is detected to have data. Among them, the setting of the preset value is not limited in the embodiment of the present invention, and can be preset by the designer, or it can be set according to the specific usage scenario. In the embodiment of the present invention, the value of the preset time is not limited, and can be preset by the designer, for example, it is set to 20 seconds, or it can be set according to the specific usage scenario.

In the embodiment of the present invention, by sending an execution instruction for setting the table key according to the key update task parameters and the table file information, a more efficient execution of the table key setting operation is achieved.

Step S103: according to the execution instruction, set the table key and receive the returned execution data.

In the embodiment of the present invention, the execution data includes information such as the execution steps, i.e., setting the table key, the execution result, etc., wherein the execution result in the embodiment of the present invention can be timeout, success, and failure.

In the embodiment of the present invention, the corresponding key parameters and other information can be read from the database according to the ID information in the execution instruction, and the key parameters and other information can be sent to the carrier module to set the table key. After the electric energy meter completes the setting of the table key, the execution result and other information are returned to the carrier module, and the information is returned to the reading module through the carrier module. The reading module parses the returned information to generate execution data, and the strategy module receives the execution data and stores it in the strategy execution queue.

In the embodiment of the present invention, the concurrent characteristics of the carrier module are utilized to achieve a more efficient operation of setting the secret key for the electric energy meter.

Step S104: according to the execution data, an operation instruction for reading the CRC of the table key is sent.

In the embodiment of the present invention, the operation instruction includes information such as the serial number of the electric energy meter, the execution step, i.e., reading the CRC of the meter key, and the ID.

In an embodiment of the present invention, an operation instruction for reading the CRC of the table key can be sent according to the execution result in the execution data. It should be noted that in an embodiment of the present invention, it is necessary to determine whether the execution result is a timeout. If the execution result is a timeout, the number of executions is determined. If the number of executions is less than a preset value, an execution instruction is sent. If the number of executions is equal to the preset value, the failure event is reported to the system master station. If the execution result is not a timeout, that is, success or failure, an operation instruction for reading the CRC of the table key is sent. Among them, in an embodiment of the present invention, there is no restriction on the size of the preset value, which can be pre-set by the designer, for example, set to three times, or can be set according to the specific usage scenario.

In the embodiment of the present invention, according to the execution data, through the execution steps and the execution results, it is possible to prevent interference when executing functions, decouple functions, and perform operations more efficiently.

Step S105: According to the operation instruction, read the CRC of the table key and receive the returned read data.

In the embodiment of the present invention, reading data includes executing steps, i.e. reading the CRC of the table key, executing results and other information, wherein the executing results in the embodiment of the present invention may be timeout, success and failure.

In the embodiment of the present invention, according to the operation instruction, the corresponding key content and other information can be read from the database, and the information is sent to the carrier module to realize reading the CRC of the table key. After reading the CRC of the table key of the electric energy meter, the execution result and other information are returned to the carrier module, and the information is returned to the reading module through the carrier module. The reading module parses the returned information to generate read data, and the strategy module receives the read data and stores it in the strategy execution queue.

In the embodiment of the present invention, by utilizing the concurrent characteristics of the carrier module, a more efficient CRC operation of reading the table key of the electric energy meter is achieved.

Step S106: Perform CRC verification based on the read data to complete the key update.

In the embodiment of the present invention, CRC verification can be performed according to the execution result in the read data to complete the key update. It should be noted that in the embodiment of the present invention, it is necessary to determine whether the execution result is a timeout. If the execution result is a timeout, the number of executions is determined. If the number of executions is less than the preset value, the operation instruction is sent. If the number of executions is equal to the preset value, the failure event is reported to the system master station. If the execution result is successful, CRC verification is performed to complete the key update. If the execution result is a failure, the failure event is reported to the system master station. Among them, in the embodiment of the present invention, there is no restriction on the size of the preset value, which can be pre-set by the designer, for example, set to three times, or set according to the specific usage scenario. It should be noted that the method of CRC verification in the embodiment of the present invention can be to compare the CRC value of the table key read and the CRC value of the key in the database to see if they match. If they match, the result is sent to the system master station to complete the key update.

In the embodiment of the present invention, since the secret key of the electric energy meter is in write-only mode, the secret key cannot be read for comparison to determine the final result. If the electric energy meter reply after setting the secret key is used for judgment, the security is not high. In the embodiment of the present invention, by performing CRC verification to determine the final result, it is possible to accurately determine whether the electric energy meter has been truly updated, and to quickly and effectively form a closed loop for the entire secret key update function.

Based on the above embodiments, the embodiments of the present invention ensure that the functions of executing key updates are performed concurrently without interfering with each other by operating in the acquisition terminal, thereby achieving functional decoupling. In addition, the embodiment of the present invention verifies the key update through CRC check, which can ensure that the electric energy meter truly completes the key update.

The above process is explained below through a specific example. In the embodiment of the present invention, the acquisition terminal of the Linux platform is selected to access the DLMS protocol electric energy meter with a high security level access control key. In this acquisition terminal, there are two functional modules, namely the policy module and the reading module, which can be threads or processes. In the embodiment of the present invention, there are two processes, which are equivalent to two independent APPs running in the Linux system. The policy module is the active party, the reading module is the passive party, and the electric energy meter is the target device. The step of setting the table key is step1, and the ID of setting the table key is id1; the step of reading the CRC of the table key is step2, and the ID of reading the CRC of the table key is id2.

Please refer to FIG. 3 , which is a specific flow chart of data transmission provided by an embodiment of the present invention. The specific process is as follows:

The specific data sending process of the strategy module is as follows:

1. Check whether there is data in the temporary execution area of the strategy. If so, the group message is sent to the reading module.

2. When there is no data in the temporary policy execution area, check whether there is data in the policy execution queue. If there is data, extract and delete the data from the policy execution queue, and the policy module determines the execution steps and results.

3. If the execution step is step1, determine the execution result. If the execution result is timeout, determine the number of executions. If the number of executions is less than 3 times, do not change step1 and id1, and send the group message to the reading module to form an execution instruction. If the number of executions is equal to three times, generate a failure event and report it to the system master station. When the execution result is success or failure, modify step1 to step2, id to id2, and send the group message to the reading module to form an operation instruction.

4. If the execution step is step2, determine the execution result. If the execution result is timeout, determine the number of executions. If the number of executions is less than 3 times, do not change step 2 and id2, and form a group message to send the operation instruction to the reading module. If the number of executions is equal to three times, a failure event is generated and reported to the system master station. When the execution result is successful, the strategy module compares the CRC value. When they are consistent, a success event is generated and reported to the system master station. When the execution result is a failure, a failure event is generated and reported to the system master station.

5. When there is no data in the strategy execution queue, data is generated from the strategy extractor. N is the serial number of the table file, starting from 0, indicating that the first execution is the key update of the electric energy meter with serial number 0. The modification step is step1, and the id is id1. The group message forms an execution instruction and is sent to the reading module. Nmax is the total number of table files set by the master station, which is generally less than 1024.

The specific data sending process of the reading module is as follows:

Check whether there is data in the reading execution queue. If there is data, extract and delete the data, send the group message to the carrier module, and then send it to the electric energy meter to set the meter key or read the CRC of the meter key.

Please refer to FIG. 4, which is a specific flow chart of data receiving provided by an embodiment of the present invention. The specific process is as follows:

The specific data receiving process of the strategy module is as follows:

1. After the data generated in the strategy execution temporary area is sent, if the copy execution queue replies that the queue is full, no processing will be done and it will continue to send after waiting for 20 seconds. Otherwise, the data in the strategy execution temporary area will be sent and deleted, and the program will exit from the current function.

2. After the data is generated and sent from the strategy execution queue, if the copy execution queue replies that the queue is full, the data is stored in the strategy execution temporary area. After waiting for 20 seconds, the program exits from the current function and checks whether there is data in the strategy execution temporary area. Otherwise, the data is not stored in the execution temporary area and the program exits from the current function.

3. After the data generated by the policy extractor is sent, if the copy execution queue replies that the queue is full, the sequence number remains unchanged. After waiting for 20 seconds, the program exits from the current function and checks whether there is data in the policy execution temporary area. Otherwise, the sequence number is increased by 1 and the program exits from the current function.

The specific data receiving process of the reading module is as follows:

After receiving the reply from the energy meter, the validity of the message is determined, and the execution result is obtained as failure or success based on the message parsing of the DLMS protocol. For example, if no reply is received from the energy meter after a period of timeout, the execution result is timeout, and the generated execution data or read data is sent to the strategy execution queue.

In the embodiment of the present invention, the asynchronous execution operation of two functional modules is used to ensure that the functions of executing the key update are performed concurrently without interfering with each other, thereby realizing functional decoupling. By executing the steps and the execution results, the CRC check is finally read to verify the key update, which can quickly and effectively form a closed loop for the entire key update function, thereby ensuring that the electric energy meter truly completes the key update.

A key updating device and a collection terminal device provided in an embodiment of the present invention are introduced below. The key updating device and the collection terminal device described below can correspond to the key updating method described above.

Please refer to FIG. 5 , which is a structural block diagram of a key updating device provided by an embodiment of the present invention. The device may include:

The receiving module 201 is used to receive the key update task parameters and table file information;

A first sending module 202, configured to send an execution instruction for setting a table key according to the key update task parameters and the table file information;

A key setting module 203, used to set the table key according to the execution instruction and receive the returned execution data;

A second sending module 204 is used to send an operation instruction to read the CRC of the table key according to the execution data;

A key reading module 205 is used to read the CRC of the table key and receive returned read data according to the operation instruction;

The verification module 206 is used to perform CRC verification based on the read data to complete the key update.

Based on the above embodiment, the receiving module 201 may include:

A judgment unit, used to compare whether the key update task parameters are consistent with the table file information;

The sending unit is used to determine the electric energy meter to be updated with the secret key and send the execution instruction for setting the table secret key if it matches.

Based on any of the foregoing embodiments, the first sending module 202 may include:

A first detection unit is used to detect whether the policy execution temporary area has the operation instruction; if the operation instruction is present, the operation instruction is sent;

A second detection unit is used to detect whether the policy execution queue contains the execution data if there is no operation instruction; if there is the execution data, generate and send the operation instruction according to the extracted execution data;

In the embodiment of the present invention, if the number of instructions in the copy-read execution queue reaches a preset value, a generated operation instruction is stored in the strategy execution temporary area.

The extraction unit is used for generating the execution instruction for setting the table key by using the policy extractor if the execution data is not available, and sending the execution instruction.

Based on any of the above embodiments, after the first detection unit, the following may further be included:

A judgment unit, used to detect whether the sending is successful; if the sending is successful, the policy execution temporary area is cleared;

The waiting and sending unit is used for not clearing the policy execution temporary area and waiting for a preset time to continue sending if the sending is unsuccessful.

Based on any of the foregoing embodiments, the second sending module 204 may include:

A result judgment unit, used to judge whether the execution result is a timeout;

An execution judgment unit, configured to judge the number of executions if the execution result is a timeout;

A sending unit, configured to send the execution instruction if the execution number is less than a preset value; and report a failure event to a system master station if the execution number is equal to the preset value;

An execution unit is configured to send the operation instruction of reading the CRC of the table key if the execution result is not a timeout.

Based on any of the above embodiments, the verification module 206 may include:

An execution unit, configured to perform the CRC verification and complete the key update if the execution result is successful;

The reporting unit is used to report the failure event to the system main station if the execution result is a failure.

A result judgment unit, used to judge whether the execution result is a timeout;

An execution judgment unit, configured to judge the number of executions if the execution result is a timeout;

The sending unit is used to send the operation instruction if the execution times are less than the preset value; if the execution times are equal to the preset value, report the failure event to the system main station.

Based on any of the above embodiments, the execution unit may include:

A judgment subunit, used to compare the CRC value of the table key with the CRC value of the key in the database to see if they match;

The execution subunit is used to send the result to the system main station if it matches, so as to complete the key update.

In the embodiment of the present invention, by operating in the acquisition terminal, it is ensured that the functions of executing the key update are performed concurrently without interfering with each other, thereby realizing functional decoupling, and in the embodiment of the present invention, the key update is verified by CRC check, which can ensure that the electric energy meter truly completes the key update.

Please refer to FIG. 6, which is a structural block diagram of a collection terminal device provided by an embodiment of the present invention. The collection terminal device includes:

A memory 10, used for storing computer programs;

The processor 20 is used to implement the above-mentioned key updating method when executing the computer program.

As shown in FIG6 , it is a schematic diagram of the structure of the acquisition terminal device, which may include: a memory 10 , a processor 20 , a communication interface 31 , an input/output interface 32 , and a communication bus 33 .

In the embodiment of the present invention, the memory 10 is used to store one or more programs, and the program may include program code, and the program code includes computer operation instructions. In the embodiment of the present application, the memory 10 may store programs for implementing the following functions:

Receive key update task parameters and table file information;

Sending an execution instruction for setting a table key according to the key update task parameters and the table archive information;

According to the execution instruction, setting the table key and receiving returned execution data;

According to the execution data, sending an operation instruction for reading the CRC of the table key;

According to the operation instruction, read the CRC of the table key and receive the returned read data;

According to the read data, CRC verification is performed to complete the key update.

In a possible implementation, the memory 10 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application required for at least one function, etc.; the data storage area may store data created during use.

In addition, the memory 10 may include a read-only memory and a random access memory, and provide instructions and data to the processor. A portion of the memory may also include an NVRAM. The memory stores an operating system and operating instructions, executable modules or data structures, or a subset thereof, or an extended set thereof, wherein the operating instructions may include various operating instructions for implementing various operations. The operating system may include various system programs for implementing various basic tasks and processing hardware-based tasks.

The processor 20 may be a central processing unit (CPU), an application specific integrated circuit, a digital signal processor, a field programmable gate array or other programmable logic device, a microprocessor or any conventional processor, etc. The processor 20 may call a program stored in the memory 10.

The communication interface 31 may be an interface for connecting to other devices or systems.

The input/output interface 32 may be an interface for acquiring external input data or outputting data to the outside world.

Of course, it should be noted that the structure shown in FIG. 6 does not constitute a limitation on the acquisition terminal device in the embodiment of the present application. In actual applications, the acquisition terminal device may include more or fewer components than those shown in FIG. 6 , or combine certain components.

In the embodiment of the present invention, by operating in the acquisition terminal, it is ensured that the functions of executing the key update are performed concurrently without interfering with each other, thereby realizing functional decoupling, and the key update is verified by CRC check, thereby ensuring that the electric energy meter truly completes the key update.

The embodiment of the present invention also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are loaded and executed by the processor, the receiving of key update task parameters and table file information is realized; according to the key update task parameters and the table file information, an execution instruction for setting the table key is sent; according to the execution instruction, the table key is set and the returned execution data is received; according to the execution data, an operation instruction for reading the CRC of the table key is sent; according to the operation instruction, the CRC of the table key is read and the returned read data is received; according to the read data, CRC verification is performed to complete the key update. In the embodiment of the present invention, by operating in the acquisition terminal, it is ensured that the functions of executing the key update are performed concurrently without interfering with each other, functional decoupling is achieved, and the key update is verified by CRC verification, which can ensure that the electric energy meter truly completes the key update.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

The above is a detailed introduction to a key update method, device, acquisition terminal equipment and storage medium provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims (9)

1. A method for updating a secret key, characterized in that it is applied to a collection terminal and comprises: Receive key update task parameters and table file information; Sending an execution instruction for setting a table key according to the key update task parameters and the table archive information; Wherein, the sending of the execution instruction for setting the table key comprises: detecting whether the policy execution temporary area has an operation instruction of the CRC of the table key; if the operation instruction is present, sending the operation instruction; if the operation instruction is not present, detecting whether the policy execution queue has returned execution data; if the execution data is present, generating and sending the operation instruction according to the extracted execution data; if the execution data is not present, generating the execution instruction for setting the table key by using the policy extractor, and sending the execution instruction; According to the execution instruction, setting the table key and receiving the execution data; Send and read the operation instruction according to the execution data; According to the operation instruction, read the CRC of the table key and receive the returned read data; According to the read data, CRC verification is performed to complete the key update. 2. A method for updating a secret key according to claim 1, characterized in that if the operation instruction is present, after sending the operation instruction, the method further comprises: Check whether the sending is successful; If the sending is successful, the policy execution temporary area is cleared; If the sending is unsuccessful, the policy execution temporary area will not be cleared and the sending will continue after waiting for a preset time. 3. A method for updating a secret key according to claim 1, characterized in that after generating and sending the operation instruction according to the extracted execution data, the method further comprises: If the number of instructions in the copy execution queue reaches a preset value, a generated operation instruction is stored in the strategy execution temporary area. 4. The method for updating a secret key according to claim 1, wherein sending and reading the operation instruction according to the execution data comprises: Determine whether the execution result is timeout; If the execution result is a timeout, determining the number of executions; If the execution times are less than a preset value, sending the execution instruction; If the execution times are equal to the preset value, the failure event is reported to the system master station; If the execution result is not a timeout, sending the operation instruction for reading the CRC of the table key. 5. A method for updating a secret key according to claim 1, characterized in that the step of performing CRC verification according to the read data to complete the key update comprises: If the execution result is successful, the CRC verification is performed to complete the key update; If the execution result is failure, the failure event is reported to the system master station; Determine whether the execution result is a timeout; If the execution result is a timeout, determining the number of executions; If the execution times are less than a preset value, sending the operation instruction; If the execution times are equal to the preset value, the failure event is reported to the system main station. 6. A method for updating a secret key according to claim 1, characterized in that the step of performing CRC verification according to the read data to complete the secret key update comprises: Compare the CRC value of the table key with the CRC value of the key in the database to see if they match; If they match, the result is sent to the system master station to complete the key update. 7. A method for updating a key according to claim 1, characterized in that the step of sending an execution instruction for setting a table key according to the key update task parameter and the table file information comprises: Comparing the key update task parameters with the table file information to see if they are consistent; If they match, the electric energy meter for which the secret key is to be updated is determined and the execution instruction for setting the table secret key is sent. 8. A key updating device, comprising: A receiving module, used to receive key update task parameters and table file information; A first sending module, used for sending an execution instruction for setting a table secret key according to the secret key update task parameters and the table archive information; The first sending module includes: a first detection unit, used to detect whether the policy execution temporary area has an operation instruction of the CRC of the table secret key; if the operation instruction is present, the operation instruction is sent; a second detection unit, used to detect whether the policy execution queue has returned execution data if there is no operation instruction; if the execution data is present, the operation instruction is generated and sent according to the extracted execution data; an extraction unit, used to generate the execution instruction for setting the table secret key by using the policy extractor if there is no execution data, and send the execution instruction; A key setting module is used to set the execution data according to the execution instruction; A second sending module, used for sending and reading the operation instruction according to the execution data; A key reading module, used for reading the CRC of the table key and receiving returned read data according to the operation instruction; The verification module is used to perform CRC verification based on the read data to complete the key update. 9. A data collection terminal device, characterized by comprising: Memory for storing computer programs; A processor, configured to implement the key updating method according to any one of claims 1 to 7 when executing the computer program.