Cryptography, Security and Linux
- A security resource with information on cryptographic algorithms.
- http://www.crazylinux.net/

Provably secure protocols
- A list of published provably secure key establishment and mutual authentication protocols.
- http://sky.fit.qut.edu.au/~choo/lounge.html

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/

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

North American Cryptography Archives
- A comprehensive archive for cryptography source code, software, literature, and links.
- http://cryptography.org/

Neil Johnson's Cryptography Site
- A resource featuring current security news and an introduction to cryptography.
- http://www.jjtc.com/Security/crypto.htm

Kremlin by Mach 5 Software
- A description of various cryptographic algorithms and a commercial suite of encryption software.
- http://kremlinencrypt.com/

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/