Steve's Encryption Forums
Hosted by Steves-Homepage and features Chat forums discussing encryption systems and algorithms across europe and the rest of the world - requires registration and login. http://www.steves-homepage.co.uk
Stubblebine Research Labs
List of current and past projects and publications. http://www.stubblebine.com/researchlabs/projects.html
Neil Johnson's Cryptography Site
A resource featuring current security news and an introduction to cryptography. http://www.jjtc.com/Security/crypto.htm
Cryptix Standard Cryptographic Algorithm Naming
Introduces a system to enumerate and give standard reference identifiers for cryptographic algorithms with sufficient detail that independent implementations will be able to interoperate. http://www.users.zetnet.co.uk/hopwood/crypto/scan/
Provably secure protocols
A list of published provably secure key establishment and mutual authentication protocols. http://sky.fit.qut.edu.au/~choo/lounge.html
Teutoburgo: OTP4U
Contains a Java crypto-tool that allows the users to easily exchange a random key between them and then use it as a key for a One Time Pad cipher. http://it.geocities.com/teutoburgo/java/otp4u.html
North American Cryptography Archives
A comprehensive archive for cryptography source code, software, literature, and links. http://cryptography.org/
General Hash Function Algorithms
General hash function algorithm implementations for string hashing in the object pascal, c and c++ programming languages. http://www.partow.net/programming/hashfunctions/
Kremlin by Mach 5 Software
A description of various cryptographic algorithms and a commercial suite of encryption software. http://kremlinencrypt.com/