Free encryption algorithms software for linux

Optimization Algorithm Toolkit is a workbench and toolkit for developing, evaluating, and playing with classical and state-of-the-art optimization algorithms on standard benchmark problem domains; including reference algorithm implementations, graphing, visualizations and much more. The project was developed initially by Jason Brownlee as a part of his Ph.D. program.
The goal of this project is to deliver obscure-and-prevalent, old-and-new optimization algorithms from research literature to both research scientists and algorithm practitioners alike. Algorithms include biologically inspired approaches such as evolutionary algorithms (genetic algorithms), swarm algorithms (ants and particle swarm), and immune system algorithms.
Also included are more conventional approaches such as approaches inspired by physics including simulated annealing and extremal optimization. Problem domains include numerical function optimization, traveling salesman problems, and protein folding all with many standard benchmark instances taken from research literature.
A user-friendly graphical interface is provided to rapidly evaluate and compare algorithm and problem configurations, visualize algorithm behavior, and graph algorithm performance over time. A robust, modular, and extensible framework underlies the platform to facilitate the easy addition and modification of algorithms, addition of new problem domains and problem instances as well as facilitate more advanced algorithm experimentation.
The algorithm implementations are extensible and easily support modification and applicaition to varied problem domains. Please report any bugs, feature requests or include your own algorithms by accessing the services on the project home website. This is an open source project (released under the GPL) so the source code is available. The project was compiled with Java 1.5 (update 9).
Enhancements:
- This release includes many framework and graphical interface fixes, as well as a few new algorithms to play with.

Gaim-Encryption uses NSS to provide transparent RSA encryption as a Gaim plugin.
Main features:
- Automatically creates a public/private key pair for you upon loading the plugin
- Automatically transmits your public key to other users.
- Supports 512 - 4096 bit keys.
- Saves keys of known users, and warns you if their public key has changed.
- Embeds all encryption and keys inside HTML, so if the other user doesnt have the plugin, they will get a little message telling them about the plugin, and wont get a screen full of garbage.
- Stores keys in human readable files in your .gaim directory, in case you ever need to copy/edit them by hand. Which you really shouldnt have to do.
- Automatically recognizes if you are chatting with someone who has the plugin- see the Preferences dialog.
- Available for the Windows version of Gaim.
- Modular and extensible. If you want to define a different type of encryption, you can use this plugin as a wrapper to take care of transporting the encrypted binary over the IM pipe.

Cryptonit project is a client side cryptographic tool which allows you to encrypt/decrypt and sign/verify files with PKI (Public Key Infrastructure) certificates.
Main features:
- Encryption/decryption based on highly reliable algorithms
- Signature/verification procedures ensuring tamper-proof documents
- Use of passwords, certificates & smart (chip) cards for file encryption
- Address book for saving and organizing contacts
- Ability to import contacts and their certificates from the corporate directory (LDAP import)
- Multiple user account management
- Interfaces in both English and French
- CRL download
- RSA cryptography (public key cryptography standard)

Eureka Messenger 4 software delivers secure and private messaging and unlimited file transfers over the internet.

This application no longer requires the VB Runtimes, but this new version 4 is not compatible with the previous windows version.

Installation:

Actually there is no install for this application. You can run it right where you unzipped it, or copy the files unzipped wherever you want them.

If there is a firewall on either machine, some configuration may be required in order to make a connection.

The program has a Help file to guide you on how it works, although it is simple enough to run without much assistance.

You probably need to issue a chmod +x messenger before it can run. On some linux systems you may also need to issue a chmod +755 messenger.