JPH03108830A - Cipher transmission system - Google Patents

Abstract

PURPOSE:To prevent invasion of a hacker or the like intercepting a confidential data from a line by dividing a ciphered data into small pieces of data, sending them through plural lines, rearranging them into the original ciphered data in the stage of line concentration and then decoding the ciphered data. CONSTITUTION:A data sent from a sender terminal equipment 11 is subject to f-conversion at a ciphering device 21, ciphered and the result is divided into small pieces of data by a distributer 31 and sent through plural communication lines 50. The small pieces of data sent through the plural lines are subjected to delay correction caused resulting from the transmission on the lines with a delay correction buffer 60 prepared corresponding to each line. The data are rearranged again into the original order by a line concentrator 32, decoded by f<-1> conversion at a cipher decoder 22 and the result is sent to a reception side terminal equipment 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cryptographic transmission system for transmitting encrypted data between terminals.

[Conventional technology]

In the conventional cryptographic transmission method, the data sent from the sending terminal is encrypted by an encrypting device, transmitted over a single line where a call is set up, and then the encrypted data is decoded by a decrypting device to retrieve the original data. data was restored and sent to the receiving terminal.

This will be explained with reference to FIG. FIG. 2 is a block connection diagram showing a conventional example.

As shown in FIG. 2, the sending terminal 11 has an encryption device 21
The receiving terminal 12 is connected to the communication line 30 via the decryption device 22, and the receiving terminal 12 is connected to the communication line 30 via the decryption device 22. The communication line 3o is a line set up according to the call processing procedure of the switched network.

[Problem to be solved by the invention]

The conventional encryption transmission method described above is configured to transmit encrypted data over a single line, so if the encryption rules in the encryption device are leaked to the outside, confidential data can be easily retrieved. The problem was that it was easily compromised by backers and others.

An object of the present invention is to provide a cryptographic transmission system that solves the above problems.

[Means to solve the problem]

The basic configuration of the cryptographic transmission method of the present invention is an encryption device that encrypts and outputs data sent from a sending terminal, and an encryption device that decodes the encrypted data received from this encryption device and sends it to a receiving terminal. A series of cryptographic transmission systems comprising a decryption device that transmits a code, a distribution device that divides data sent by the encryption device and sequentially distributes the divided data onto multiple lines, and a distribution device that divides the data sent by the encryption device and sequentially distributes the divided data onto multiple lines, and a distribution device that transmits the data through the multiple lines. and a line concentrator that rearranges the divided data transmitted over the plurality of lines back to the original order and sends it to the decryption device.

One of the specific details of the basic configuration is a delay correction buffer that connects the plurality of lines to the line concentrator line by line and corrects the delay of transmission data for each line according to instructions, and a delay correction buffer that instructs the delay correction buffer to perform delay correction. and a line concentration control section.

[Effect]

The encrypted transmission method using the above means can encrypt a series of communication data sent from the sending side, and then divide the data and send it to multiple lines. Therefore, divided encrypted data is transmitted over one line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block connection diagram showing one embodiment of the present invention.

In FIG. 1, the same components as those in FIG. 2 described in the prior art are given the same numbers and symbols, and the explanation thereof will be omitted. The transmitting terminal 11 is connected to the distribution device 31 via the encrypting device 21, and the receiving terminal 12 is connected to the line concentrator 32 via the encrypting device 22. The communication line 30 in FIG. 2 that connects the encryption device 21 and the decryption device 22 includes a distribution device 31. The line concentrator 322 distribution control section 41 has a line concentration control section 42 and a delay correction buffer 60, and the communication line 50 connects the distribution apparatus 31 and the delay correction buffer 60 through a plurality of lines.

The distribution device 31 receives a series of encrypted data output from the encryption device 21, and under the control of the distribution control unit 41 divides the received data into small pieces and distributes them to a plurality of communication lines 50. do. The line concentrator 32 receives the small pieces of data transmitted through the plurality of communication lines 50 under the control of the line concentrator 42, arranges them in the original order, restores them to output data from the encryptor 21, and decodes the data from the decryptor 22. Output to.

The delay correction buffer 60 accommodates the communication line 50 connected to the line concentrator 32 , and is controlled by the line concentrator 42 to perform delay correction for each line through which small piece data is transmitted, so that the communication line 50 is connected to the line concentrator 32 . Connect to.

Next, the operation will be explained along with the flow of data with reference to FIG. The data sent from the sending terminal 11 is subjected to f conversion in the encryption device 21, encrypted, and divided into small pieces of data by the distribution device 31, and then divided onto multiple lines of the communication line 50. and transmitted. The small pieces of data transmitted over multiple lines are corrected for delays caused by transmission over the lines by a delay correction buffer 60 prepared for each line, rearranged in the original order by the line concentrator 32, and decrypted. After being restored by converting f-1 by the device 22, it is transmitted to the receiving terminal 12. Note that the distribution device 31. Delay correction buffer 60 and line concentrator 3
2 receives the synchronized clock from the communication network, and the distribution control unit 4
1 or a predetermined timing generated by the line concentration control unit 42, the respective operation timings are controlled.

In this embodiment, the delay correction buffer is illustrated and explained separately from the line concentrator, but there is also a means to absorb small delay corrections at the line concentration stage of the line concentrator. The correction buffer may be omitted.

〔Effect of the invention〕

As explained above, when encrypting and transmitting confidential data between terminals, the present invention not only encrypts the data, but also divides the encrypted data into small pieces of data, transmits them over multiple lines, and then performs a concentrating step. Then rearrange the data to the original encrypted data,
By using a configuration in which the encryption is then decrypted, even if the encryption rules are leaked to the outside world, it is possible to prevent a breach by an external backer or the like who extracts confidential data from the line.

Puffa.

Claims (2)

[Claims] (1) Consists of an encryption device that encrypts and outputs the data sent from the sending terminal, and a decryption device that decodes the encrypted data received from the encryption device and sends it to the receiving terminal. In a series of cryptographic transmission systems, a distribution device that divides data sent by the encryption device and sequentially distributes the divided data onto multiple lines; and a line concentrator that rearranges the transmitted divided data back into the original order and sends the divided data to the decryption device. (2) A delay correction buffer that connects the plurality of lines to the line concentrator for each line and corrects the delay of transmission data for each line according to an instruction, and a line concentration control unit that instructs the delay correction buffer to perform delay correction. Claim (1)
) Encryption transmission method described.