Open Source Java Cryptography Software for Linux

JSignPdf is a free, open-source Java application for signing PDF documents with digital certificates. It provides a graphical desktop interface for everyday users and a command-line mode for scripted and server-side workflows. Supported capabilities include PKCS#12 keystores, smartcards and hardware tokens (PKCS#11), Windows keystore integration, visible signatures with custom images and positioning, timestamp authority (TSA) support, OCSP/CRL revocation checks, certification signatures, and PDF encryption. Cross-platform (Windows, Linux, macOS), built on the OpenPDF library, and translated into many languages by its community, JSignPdf is a trusted choice for anyone who needs reliable PDF signing without commercial licensing.

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.

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, Polish

An application to provide a worldwide mobile secure/confidential payment system over the internet and other kinds of insecure/unreliable networks

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

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.

AntolliCrippi Java is a simple, easy to use and multi-language tool to encrypt your files. AntolliCrippi Java is a Password Based encryptor tool written in Java. Thanks to a very simple user interface allows you to encrypt/decrypt your files in a few second. It also provide folder encryption, by converting them into a zip file before. It's available in three languages Italian, English and Spanish. But thanks to his architecture it's easy to add many other languages. All the language specification are written into some XML files. Has been written according to the Model-View-Controller design pattern so it will be easy to add more functionality.

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/

Tool "Contego" for encryption to plain text (UTF-8) and verification, testing and generation of MD5 and SHA-1 sums for files. Version 2.0 multilnguaje and fully operational. Encriptacion para texto plano (UTF-8) y utilidades para sumas MD5 y SHA-1.

Portable and simple program for text and files encryption (Symmetric, Asymmetric and Steganography)

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. You will find more about it at this web site: https://www.frojasg1.com:8443/downloads_web/web/html/encriptadorDeArchivos.html?origin=sourceforge

Ganzúa is a cryptanalysis tool for classical ciphers (mono and polyalphabetic) that lets the user define almost completely arbitrary cipher and plain alphabets, allowing for the proper cryptanalysis of cryptograms obtained from non-English texts.

INTIX-JSIGNER is a java web application for signing documents (XML and/or PDF) of unattended way and in the server side. It has as main modules the following: Authentication, XML and PDF Signing and Keys and Certificates Management.

The aim of this project is to create a set of basic java tools for developers who need Certificate Authority (CA) root certificates and user certificates signed by the CA.

JCEF (Java Cryptographic Extension Framework) is an API that facilitates enormously the use of the cryptographic architecture of Java

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.

Messa is a fully distributed instant messaging and presence application.

OpenSignX is a document and form signing Java applet for PKI X.509 certificates. It is based on www.openOCES.org and provides generation XAdES enveloping signature of one or multiple documents supporting PKCS#11 Java keystores.

Un programa para cambiar el orden de las palabras en una frase o las letras de una palabra u otros algoritmos. Su principal objetivo es cambiar las frases para hacerlas mas ilegibles o para aparentar ser más friki en tus conversaciones o por diversi

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.

Set of tools to generate XUL based forms with xforms support.

jHashCalc is a GPL implementation of the popular hashing utility "HashCalc" from SlavaSoft. jHashCalc is written in Java language, and uses the GNU Crypto API to perform the algorithms' computing.

mBuddy is a project with the initial goal of allowing users of mobile devices (Java, J2ME) the option to find others based on interests, diet & other factors. Objectives are to allow intelligent, conditional, secure exchange of contact info, A/V & more.