Browse free open source Cryptography software and projects for Windows and Linux below. Use the toggles on the left to filter open source Cryptography software by OS, license, language, programming language, and project status.

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  • 1
    Password Safe

    Password Safe

    Popular easy-to-use and secure password manager

    Password Safe is a password database utility. Users can keep their passwords securely encrypted on their computers. A single Safe Combination unlocks them all.
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    Downloads: 3,523 This Week
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  • 2
    JSignPdf
    JSignPdf is an open-source Java application that adds digital signatures to PDF documents.
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    Downloads: 664 This Week
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  • 3
    FreeArc combines best 7-zip and RAR features: auto-selected LZMA/PPMD/Multimedia compression, 1gb dictionary, exe/dict/delta data filters, updatable solid archives, SFXes, recovery record, AES+Twofish+Serpent encryption, Linux support and much more...
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    Downloads: 404 This Week
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  • 4
    EJBCA, JEE PKI Certificate Authority
    EJBCA is an enterprise class PKI Certificate Authority built on JEE technology. It is a robust, high performance, platform independent, flexible, and component based CA to be used standalone or integrated in other JEE applications.
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    Downloads: 154 This Week
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  • 5
    RetroShare

    RetroShare

    [WARNING] Project has moved to http://github.com/Retroshare/Retroshare

    [IMPORTANT] Retroshare is now distributed on Github. Please go to http://retroshare.net to find the latest releases and sources. RetroShare is a cross-platform, secured and decentralized communication system. It lets you to securely chat, share photos, videos, and more with family and friends, using OpenPGP to authenticate peers and OpenSSL to encrypt all communication.
    Downloads: 7 This Week
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  • 6
    GoldBug - Encrypted Communications

    GoldBug - Encrypted Communications

    Chat Messenger. E-Mail-Client. Websearch. Filetransfer.

    GoldBug is a decentralized & secure communication suite that offers an integrated e-mail client, an instant messenger & a file transfer. Also included is an URL-RSS-DB & a p2p web search. Current vers. w/ McEliece Algorithm. GoldBug has been 2013 - 2023 ten years just another Graphical User Interface of the Spot-On Encryption Suite. Main GUI features: Minimal & colorful Interface with Tabs in the East. Microsoft & Qt MinGW deprecated Win32 & for Compiling: ● https://sourceforge.net/p/goldbug/wiki/compiling As Spot-On implemented the minimal GB-concept & Nuvola Icons, GoldBug has now been fully integrated into Spot-On Win64: Just choose Tabs at East & Mini-View in Options - w/ Nuvola Icons of course! Voilá! & Many Thanks, Pro-Files can be found archived at ● current source: https://github.com/textbrowser/spot-on ● EN Manual: https://www.amazon.com/dp/3749435065 ● DE: https://compendio.github.io/goldbug-manual-de/ ● Study: https://www.amazon.com/asin/dp/3750408971
    Downloads: 24 This Week
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  • 7
    EverCrack cryptanalysis engine. The goal is cryptanalysis of any class of cipher. The focus now is the kernel - cryptanalysis of unilateral monalpha substitution ciphers extremely quickly, and later, cryptanalysis of complex ciphers for the kernel.
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    Downloads: 13 This Week
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  • 8
    OpenCA

    OpenCA

    Open Source PKI solutions

    The OpenCA PKI Development Project is a collaborative effort to develop a robust, full-featured and Open Source out-of-the-box Certification Authority implementing the most used protocols with full-strength cryptography world-wide.
    Downloads: 2 This Week
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  • 9
    LazLock

    LazLock

    Free, cross platform, portable password manager.

    The latest version of LazLock is at https://github.com/cyberfilth/LazLock/releases A free, lightweight, portable password manager for Windows & GNU/Linux that encrypts your data with 128 bit AES encryption. LazLock also includes a password generator which allows you to create more secure passwords. A plain text version of your data is never written to disk as all decryption is done in memory. LazLock is truly portable, no installation is required so it can be run from a USB drive. Unlike similar programs, there are no dependencies on the .NET Framework (Windows) or Mono (Linux) ------------------------------------- Easily Copy and Paste your login details into any website without having to manually type them out. Your passwords aren't shown on screen so you can use LazLock in front of others without compromising your security. Generate more secure passwords for the websites that you visit, you only need to remember one password to unlock them all.
    Downloads: 4 This Week
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  • 10
    ufonet

    ufonet

    UFONet - Denial of Service Toolkit

    UFONet - Is a set of hacktivist tools that allow launching coordinated DDoS and DoS attacks and combine both in a single offensive. It also works as an encrypted DarkNET to publish and receive content by creating a global client/server network based on a direct-connect P2P architecture. + FAQ: https://ufonet.03c8.net/FAQ.html -------------------------------------------- -> UFONet-v1.8 [DPh] "DarK-PhAnT0m!" (.zip) -> md5 = [ c8ab016f6370c8391e2e6f9a7cbe990a ] -> UFONet-v1.8 [DPh] "DarK-PhAnT0m!" (.tar.gz) -> md5 = [ 8a4cd86c21db2ad657eb75e6ac0e52d5 ] --------------------------------------------
    Downloads: 7 This Week
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  • 11
    MyPGP

    MyPGP

    PGP graphical user interface

    MyPGP provides a graphical user interface for pgp encryption and signing. It is fully compatible with OpenPGP, and GnuPG. It relies on BouncyCastle libraries for the cryptographic primitives. It uses file system folders to store keys, either single or key rings, organized as a nested tree of folders. It can also create lists of keys for bulk operations.
    Downloads: 5 This Week
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  • 12
    Codegroup

    Codegroup

    A Java application for transferring computer files in 5 letter groups

    Codegroup is a Java application that will allow one to convert binary (or text) computer files in to 5 letter codegroups for transmission over email, landline telephones, radioteletype or Morse Code. Codegroup has internal error correction & limited cryptography capabilities. Codegroup : ZZZZZ YBPIL AIAIG FMOPP CPAAA DGNGP GPGPA ADNJN ELJKO ELIMO GEOHF KIFGP IFBCB PKCPI YJMHE PHBHP PPOBH NCOHD AKLLL AGHFP DEGEF LKELC EAIJI ABAGP AHPPO IHHPH OHPDF YNFPB ALEPO KMPKP Once this program has a graphical user interface, an Enigma like subsystem must be devised for data whitening. For content encryption, the use of Java's facilities is being considered as a long term option. This project's initial sourcecode is related to : http://www.fourmilab.ch/codegroup/ http://winmorse.com/ https://bitbucket.org/bgneal/cpp-enigma http://www.whence.com/minimodem/ For the User Interface http://www.oracle.com/technetwork/java/javafx/tools/
    Downloads: 1 This Week
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  • 13
    HashSum is a .NET port from GNU's md5sum and sha1sum. It supports: hash algorithm selection between MD5 and SHA1 (more could be added later) and compatibility between HashSum and GNU's checksum file format
    Downloads: 1 This Week
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  • 14
    Plum Harbor

    Plum Harbor

    An open-source file sharing app built using Next.js and Perplexity.

    An open-source file sharing app built using Next.js and Perplexity. The app employs ML-KEM-1024, ChaCha20, Serpent-256, and HMAC-SHA512 to ensure data confidentiality and integrity. The app is also equipped with a dedicated password vault. Check it out at https://plum-harbor.netlify.app/ GitHub page: https://github.com/Northstrix/plum-harbor Codeberg page: https://codeberg.org/Northstrix/plum-harbor The app is available in English and Hebrew. German version is available here: SourceForge: https://sourceforge.net/p/plum-harbor-deutsch GitHub: https://github.com/Northstrix/plum-harbor-deutsch Codeberg: https://codeberg.org/Northstrix/plum-harbor-deutsch Deployed app: https://plum-harbor-deutsch.netlify.app/
    Downloads: 1 This Week
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  • 15
    Set of tools to generate XUL based forms with xforms support.
    Downloads: 1 This Week
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  • 16
     In-Browser-File-Encrypter

    In-Browser-File-Encrypter

    The source code of the In-Browser-File-Encrypter web app

    The In-Browser File Encrypter is a simple web application that enables you to securely encrypt your files directly in your browser using the AES-256 encryption algorithm in CBC mode. Check it out at: https://codepen.io/Northstrix/pen/xxvXvJL and https://northstrix.github.io/In-Browser-File-Encrypter/V1.0/web-app.html GitHub page: https://github.com/Northstrix/In-Browser-File-Encrypter The download shortcut: https://sourceforge.net/projects/in-browser-file-encrypter/files/V1.0%20%28Improved%20UI%29/V1.0%20%28Improved%20UI%29.zip/download Successfully tested in Google Chrome on Windows 11 and Fedora 40.
    Downloads: 0 This Week
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  • 17
    The Ada Cryptographic Framework (ACF) is a set of Ada packages that implement the most popular cryptographic algorithms. The main goal of the proyect is to implement a complete set of cryptographic primitives entirely in Ada 95
    Downloads: 0 This Week
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  • 18
    Aes Edition hacker
    Paranoia Text Encryption mantiene SMS, correos, mensajes de redes sociales, notas y cualquier otro texto a salvo de ladrones, hackers y fisgones. Basta con pegar texto copiado desde cualquier aplicación, o guardarlo en un archivo para usarlo más adelante. Paranoia Text Encryption keeps SMS, mails, messages from social networks, notes and any other text safe from thieves, hackers and snoopers. Simply paste text copied from any application, or save it in a file, use it more later
    Downloads: 0 This Week
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  • 19
    Arcanum Editor
    The Arcanum Editor is a small but powerful tool to encrypt and decrypt messages. The program also comes with it's own format CTXT. This format is based on XML and allows you to save texts with the Advanced Encryption Standard.
    Downloads: 0 This Week
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  • 20
    This program allows you to establish cryptographically secure and decentraliced conversations over untrusted telecommunication links and IRC networks.
    Downloads: 0 This Week
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  • 21
    Cia project tries to develop an all-purpose security tool. It's composed by ctools, the security tool; cfs, the app and cfs-server, a file & key server.
    Downloads: 0 This Week
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  • 22
    This is an experimental program that encrypt/decrypt/divide/join files. This program uses a new algorithm made by me, this algorithm is experimental and I working on it, every day this algoritm will be better.
    Downloads: 0 This Week
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  • 23
    Cifradocesar
    Para proteger la información sensible de miradas ajenas, no basta con ocultarla en una carpeta anónima o ponerla en un archivo comprimido; lo suyo es cifrar los datos para que nadie pueda leerlos
    Downloads: 0 This Week
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  • 24
    Cifrar texto
    Encriptador es un sencillo sistema para convertir un texto cualquiera en caracteres equivalentes sin sentido, y después poderlos volver a convertir en texto normal. En una única interfaz realizaremos tanto la encriptación como la desencriptación. Sólo hará falta pegar el texto en su ventana correspondiente, que depende si es para desencriptar o para encriptar, y listo
    Downloads: 0 This Week
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  • 25
    Clipperz Password Manager
    Clipperz is a web based password manager. Local encryption within the browser guarantees that no one except you can read your data. A true zero-knowledge (or host-proof) web app!
    Downloads: 0 This Week
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