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Browse free open source Java Security Software and projects below. Use the toggles on the left to filter open source Java Security Software by OS, license, language, programming language, and project status.

  • One Platform. Total IT Insight. Start with PRTG Now Icon
    One Platform. Total IT Insight. Start with PRTG Now

    Rely on a single source of truth. PRTG unifies monitoring for all your systems, apps, and services.

    Why settle for fragmented monitoring? PRTG consolidates everything - servers, VMs, network devices, cloud services, and more, into one powerful platform. Get real-time status, customizable alerts, and deep analytics to drive smarter decisions. Designed for complex environments, PRTG scales with your needs, supports team collaboration, and helps you prevent outages before they impact users. Take control of your IT landscape and deliver the uptime your business requires.
    Start Your Free PRTG Trial
  • Dominate AI Search Results Icon
    Dominate AI Search Results

    Generative Al is shaping brand discovery. AthenaHQ ensures your brand leads the conversation.

    AthenaHQ is a cutting-edge platform for Generative Engine Optimization (GEO), designed to help brands optimize their visibility and performance across AI-driven search platforms like ChatGPT, Google AI, and more.
    Learn More
  • 1
    winPenPack

    winPenPack

    The portable software collection

    winPenPack is a project that aims at collecting the most frequently used and most popular open source applications made portable, so that they can be executed without installation from any USB Flash Drive or Hard Disk. The winPenPack suites offer a wide range of portable applications like office tools, internet tools, multimedia tools, development tools, security applications and other frequently used utilities. Everything you need, completely free, open source and portable!
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    Downloads: 521 This Week
    Last Update:
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  • 2
    mendelson AS2

    mendelson AS2

    Implementation of the EDIINT AS2 protocol (RFC 4130)

    mendelson AS2 is the JAVA-based open source EDIINT AS2 solution. Monitoring- and configuration GUI, async & sync MDN, signatures, encryption, TLS, web interface, pluggable into any servlet container, partner manager, certificate manager, data compression, optional profiles: MA, FN. Localized to Spanish, Italian, Portuguese, German, English, French.
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    Downloads: 125 This Week
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  • 3
    OpenAS2

    OpenAS2

    AS2 1.1 server implementation in Java

    OpenAS2 is a java-based implementation of the EDIINT AS2 standard. It is intended to be used as a server. It is extremely configurable and supports a wide variety of signing and encryption algorithms. Supports very high traffic volume allowing parallel processing of files per partner. SUPPORT: Please use the Github issues and Discussions channels here: https://github.com/OpenAS2/OpenAs2App/ Requirements: - Java 11 or newer (tested with the LTS versions of Java up to 21) - Any OS that runs Java Planned enhancements in the next major release: - User interace configuration GUI - Certificate Exchange Management IMPORTANT: Java 8 is no longer supported.
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    Downloads: 62 This Week
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  • 4
    Untangle
    Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com
    Downloads: 45 This Week
    Last Update:
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  • OpManager the network monitoring software used by over 1 million IT admins Icon
    OpManager the network monitoring software used by over 1 million IT admins

    Network performance monitoring, uncomplicated.

    ManageEngine OpManager is a powerful network monitoring software that provides deep visibility into the performance of your routers, switches, firewalls, load balancers, wireless LAN controllers, servers, VMs, printers, and storage devices. It is an easy-to-use and affordable network monitoring solution that allows you to drill down to the root cause of an issue and eliminate it.
    Learn More
  • 5
    ANts P2P
    ANts P2P realizes a third generation P2P net. It protects your privacy while you are connected and makes you not trackable, hiding your identity (ip) and crypting everything you are sending/receiving from others.
    Downloads: 26 This Week
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  • 6
    MailArchiva is a powerful, full featured email archiving (email archiver) and compliance solution for mail systems such as Microsoft Exchange. It stores all incoming, outgoing and internal emails for long term storage. A web based user interface is avail
    Downloads: 6 This Week
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  • 7
    mendelson OFTP2

    mendelson OFTP2

    Implementation of the OFTP2 protocol (RFC 5024)

    The mendelson OFTP2 is a JAVA-based open source OFTP2 solution. It contains a logging- and configuration GUI (SWING) and supports encryption, digital signatures, message compression, TLS, certificate exchange, message routing, mail notification
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    Downloads: 31 This Week
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  • 8
    SurveyKing

    SurveyKing

    Make a better survey system

    The most powerful " build the simplest & more friendly online exams/questionnaires/public queries/question bores/voting/assessment system to support a key deployment. Supports more than 20 question types, such as filling-in-the-blank, selection, drop-down, cascading, matrix, pagination, signature, question group, upload, horizontal fill-in-the-blank, etc. A variety of ways to create questionnaires, Excel import questionnaires, text import questionnaires, online editors to edit questionnaires. A variety of questionnaire settings, support white list answers, public inquiries, answer restrictions, etc. Simple installation and deployment ( deployment within 1 minute at the fastest ), supports one-click windows deployment, one-click docker deployment, front-end and back-end separation deployment, single jar deployment, and secondary directory deployment.
    Downloads: 1 This Week
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  • 9
    Telnet over HTTP proxy. Allows users behind firewalls to tunnel Telnet sessions over a HTTP connection. Server uses Java servlets with a Java or C# client.
    Downloads: 10 This Week
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  • Comet Backup - Fast, Secure Backup Software for MSPs Icon
    Comet Backup - Fast, Secure Backup Software for MSPs

    Fast, Secure Backup Software for Businesses and IT Providers

    Comet is a flexible backup platform, giving you total control over your backup environment and storage destinations.
    Learn More
  • 10
    Novus Ordo Seclorum (Ordo for short) is a pathologically secured, invitation only secure communications framework. It is built on top of the Freenet crypto libraries.
    Downloads: 4 This Week
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  • 11
    With Tiger Envelopes you can stop snoops from reading your email. Same email client. No extra steps. One click to install on Windows and Linux. Configures Outlook, Thunderbird, and KMail. Supports GPG, PGP, Bouncy Castle encryption.
    Downloads: 4 This Week
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  • 12
    The Martus (TM) Bulletin System is used by human rights and social justice groups to track violations. This Java program is as easy to use as email. Bulletins can be encrypted or searched, and can be backed up to a remote server. See www.martus.org.
    Downloads: 2 This Week
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  • 13
    Pfyshnet is a public anonymous peer to peer network and file-system. Security is its primary concern, and it provides security for all aspects of participating nodes. It is one of the few network designs that provides strong anonymous keyword search.
    Downloads: 3 This Week
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  • 14
    Backup P2P is a peer to peer application doing automated and secured backups inside a community (Jabber, XMPP). Each user shares some available space on his disk with others, to be able in return to remotely backup some of his own data.
    Downloads: 2 This Week
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  • 15
    winKnocks is an encrypted(DES) port knocking tool. Knock sequences are defined through XML files; users specify: number of packets of each knock sequence, payload and header of each packet. Logging capability. Generation of smoke packets.No replay-attack
    Downloads: 4 This Week
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  • 16
    Smoke Crypto Chat Messenger for Android

    Smoke Crypto Chat Messenger for Android

    Smoke: Android Crypto Chat Messenger

    Smoke is an encrypting chat messenger for Android written in Java. Please read the Web site for more information: https://textbrowser.github.io/smoke/ (original, current) https://www.amazon.com/dp/3752691999/ https://smokeappope.sourceforge.io/ (old, third party archive) Smoke App OPE - Open Personal Encryption Download Android APK Installer: https://sourceforge.net/projects/smokeappope/files/ Smoke Source: https://github.com/textbrowser/smoke SmokeStack Source: https://github.com/textbrowser/smokestack (Android) https://github.com/textbrowser/spot-on (Desktop) Smoke appears to be one of the first projects with an open source mobile encrypting chat server., an decentralized and easily-configurable chat server. Smoke is known as the first mobile McEliece Messenger: https://tarnkappe.info/artikel/english/mceliece-messaging-smoke-crypto-chat-the-first-mobile-mceliece-messenger-published-as-a-stable-prototype-worldwide-279847.html
    Downloads: 4 This Week
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  • 17
    Penny Post
    Penny Post is a system to combat spam emails by making the sender "pay for email" by spending a few seconds of computing time. Outgoing mail is marked with postage stamps that convince the receiver that the sender is genuine.
    Downloads: 2 This Week
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  • 18
    DKIM for JavaMail is a small JAR that can be easily implemented in existing Java projects using JavaMail for sending DKIM signed emails.
    Downloads: 3 This Week
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  • 19
    DNA is an open, flexible and extensible deep network analyzer software server and software architecture for gathering and analyzing network packets, network sessions and applications protocols, passively off enterprise class networks.
    Downloads: 3 This Week
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  • 20
    AleHu

    AleHu

    Encrypting, anonymous, unlimited size message transfer system

    AleHu is an open source encrypted message transfer system that encompasses both server (PHP) and client software (Java). Give it a shot: You can try out AleHu by simply running the client using the preconfigured AleHu test server! For further details and instructions on how to quickly install and run AleHu, have a look at the documentation in the Wiki section.
    Downloads: 2 This Week
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    See Project
  • 21
    HPCP (High Performance Channel Protocol) is a transactional data exchange specification, defining an implementation and usage of HTTPS, XML, SOAP, and LDAP. The EEAT HPCP implementation is written in JAVA.
    Downloads: 2 This Week
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  • 22
    The J-WASTE project aims at the implementation of a platform independent client/server Java implementation of the WASTE protocol. This project started as a mandatory project course in networking at the Luleĺ University of Technology in Sweden.
    Downloads: 2 This Week
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  • 23
    Pechkin

    Pechkin

    lightweight bitmessage client

    Pechkin.v0.3.2 Copyright 2017 Fenenko Aleksandr. Licensed Apache License, Version 2.0; This is lightweight bitmessage client writing in java. Supported platform: Android,Linux,Windows PS: If you liked this programm, buy the author a coffee https://www.buymeacoffee.com/fenenkoG
    Downloads: 2 This Week
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  • 24

    SilverTunnel-NG

    Java library for easy accessing Tor network.

    SilverTunnel-NG is a Java library that implements and encapsulates all the complex network protocol stuff needed for anonymous communication over the Tor anonymity network. SilverTunnel-NG Netlib can be easily integrated in almost every existing and new Java application. The library requires Java 1.6/Java SE 6 or a newer version. This is a fork of silvertunnel (https://silvertunnel.org) Version (0.0.4) is deployed to maven. Since Version 0.0.4 SilverTunnel-NG also runs on Android. YourKit is kindly supporting this open source project with its full-featured Java Profiler. YourKit, LLC is the creator of innovative and intelligent tools for profiling Java and .NET applications. Take a look at YourKit's leading software products: http://www.yourkit.com/ . Automatic Builds and Tests are done with DEV@CloudBees : https://silvertunnel-ng.ci.cloudbees.com/
    Downloads: 2 This Week
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  • 25
    Secure Java Instant Messenger. Supports asymmetric key encryption of messages. will support multiple protocols (Jabber initially) and multiple UIs.
    Downloads: 2 This Week
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    See Project