Open Source Java Cryptography Software for Linux

This project provides a simple Java-based steganography tool that can hide a message inside a 24-bit colour image so that knowing how it was embedded, or performing statistical analysis, does not make it any easier to find the concealed information.

An encryption/decryption engine which can encrypt any file(text, pdf , doc, rtf , gpg , mp3 , mp4 etc..) or any data on your PC such that only you with the valid password can decrypt it.Also it will compress the file while encrypting it.

This is a Hash Calculating tool that calculates MD2,MD5,SHA-1,SHA-256,SHA-384,SHA-512 hash of text or a file. This has GUI developed in java swings.All it needs is sun jre installed.

GDigiDoc is a GUI frontend built with GTKMM for DigiDoc (alias OpenXAdES - http://www.openxades.org) library allowing users to create digitally signed documents and verify signatures of other users. Signatures follow the XAdES (alias ETSI TS 101 903) and

UPDATE 2024: Get a new version here: https://github.com/ivoras/EncryptedNotepad2 "Encrypted Notepad" does only one thing, but aims to do it perfectly - a Notepad-like simple text editor where files are saved (and later loaded) encrypted with industrial strength algorithms. Available both for the desktop (as a Java application) and on Android. Unencrypted data is never stored on-disk. Source is released (on SourceForge) under the BSD license.

jPBC is a Java porting of the PBC Library, a Pairing-Based Cryptography Library written in C. It supports symmetric and asymmetric pairing. With jPBC it is really easy to use such a strong cryptographic primitive.

StrongKey is a building block in an Enterprise Key Management Infrastructure (EKMI), with the goal of centrally managing symmetric encryption keys.

jFileCrypt encrypts and decrypts files and directories fast and secure. It is written in Java 5 and uses the Java Cryptographic Extensions. It supports the following algorithms: Blowfish, DES, 3DES, AES and RC4.

The project provides functionality to interface the SmartCardIO Java SDK library to Global Platform compliant smart cards, similar to globalplatform.sf.net. The difference is pure Java implementation and easy plug in to your SmartCardIO applications. This project is now more or less subsumed by Martin Paljak's continuation of the project at https://github.com/martinpaljak/GlobalPlatformPro.

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.

A software written in java to compute the digital signature on documents and verify them, using a smart card or a token file in p12 format

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

Application which allows encrypting text. It is encrypted using own libraries. I think it is a very strong way to encrypt, specially if the text has more than 1 KB. The application reads encrypted bytes from disk, and writes encyrpted bytes to disk, so it never is saved in the hard disk decrypted. JDK-17 compatibility

silvertunnel.org is a project that provides an end-user browser, a Java library and additional Java security tools to easily access anonymity networks such as the Tor (torproject.org) network. Secure and easy to use. Tor4Java and Tor Browser. Attention: see project status on page https://sourceforge.net/p/silvertunnel/discussion/962278/thread/83dc2d02/#

OhCrypt lets you easily encrypt and decrypt files using some of the most popular algorithms, like AES, Blowfish and Serpent. With OhCrypt, you can secure your data with a password-based encryption algorithm through a clean and simple interface. It demonstrates state of the art of cryptology techniques, such as password hashing and salt. Ohcrypt also features self-extractable and self-destructive encrypted files

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.

CryptoHelper is a Java program designed to aid in the decryption of classical ciphers, ie pre WWII ciphers. It brings together tools like frequency analysis, friedman tests, enciphering/deciphering for several clasical ciphers, and brute force algorithm

Encrypti is a multi platform, easy to use encrypting tool for keeping your files secure. This application offers portability of encrypted files between various platforms. Secure your files with Encrypti!

Java application for encryption with a GUI. It is based in the XOR symetric encryption combined with a pseudorandom resorting of the bytes. Strenth and time to encrypt/decyrpt per MB adapted to size of input file. Multithread. zoom Multilanguage Dark mode JDK-17 compatibility It includes detailed documentation in English, Spanish and Catalan.

stores a free text field strongly encrypted on a cell-phone or PDA using AES encryption with 256 bit -- can be used for storing passwords, pins and other sensitive data

A command-line to help encipher and decipher your password based on a simple algorithm. Java version provides GUI.

EasyJCE provides an easy to use interface for encrypting, decrypting, and hashing data for transmission or storage using the Java Cryptographic Extension (JCE). A set of Hibernate user types is included to transparently integrate encryption into the data layer in a JPA/Hibernate environment, ensuring data is persisted in its encrypted form while obscuring encryption and decryption logic from application code. EasyJCE supports most algorithms implemented for the JCE, including those provided by third-party encryption service providers. Integrated MAC (Message Authentication Code) support can optionally be used to ensure data integrity and indicate possible data tampering. EasyJCE also provides basic encoding and decoding facilities for transmitting encrypted binary data through mediums which are limited to printable ASCII characters, such as email messages or URL's.

A Secure Diary Program written in Java and using the bouncycastle JCE Cryptograpic library. It uses a combination of BlowFish and TripleDES (XORed) to encrypt Diary entries.

CoDec is a Java package for encoding and decoding ASN.1 data structures. CoDec supports the Basic Encoding Rules (BER) as well as the Distinguished Encoding Rules (DER) and provides a library with data structures for many cryptographic standards.

The CertMgr application allows you to administrator your own Certification Authority (e.g. for securing your network). You can create, sign and revoke your individual certificates via a simple User Interface.