See also:

• Computers: Internet: E-mail: Encryption  (25)
• Computers: Security: Products and Tools: Cryptography  (170)
• Computers: Software: Internet: Clients: Encryption and Privacy  (21)
• Science: Math: Applications: Communication Theory: Cryptography  (290)

• Snake Oil FAQ   - Guide to evaluating the quality and fitness for purpose of cryptography tools.

• Adam Back's Homepage: Cypherspace - Find information on some cryptanalytic hacks, breaking weak cryptosystems and links to more cryptography related websites.
• Choosing a Good Password - Tips on choosing a difficult to crack password and pitfalls in password selection.
• The Cipher Challenge - History of a code cracking competition. Challenge details, how it was solved, winners, essays and photo gallery.
• Coderpunks - Little sister of the cypherpunk mailing list. Discussion of implementations of strong, robust cryptosystems.
• Crypto Machines - Features machines and systems used in secure communications. Includes brief history on cryptography.
• Crypto-Gram - Free monthly email newsletter covering developments in cryptography and other computer security issues.
• A Cryptographic Compendium - Outline of the various types of cipher systems that have been used historically and the relationships between them.
• Cryptography FAQ - Ten part FAQ list that is essential reading for any newcomer to cryptography.
• Cryptography World - Introduction to cryptography, including concepts, key management and application.
• CryptoMX Tools - Set of cryptography tools written entirely in JavaScript, designed to work on any computer with a JavaScript capable browser.
• Cyphernomicon - Tim May's CryptoNotes, and an introduction to the Cypherpunks.
• Cypherpunks - Group, with mailing list, that is interested in privacy and cryptography.
• Deschall - Articles describing the first crack of a DES-encrypted message, with some source code and mailing list archives.
• Frode Weierud's Cryptology Page - History of cryptography, cipher machines and their simulation, cryptanalysis and other code breaking techniques.
• Handbook of Applied Cryptography - Reference work available for free download (with restrictions) from the Web.
• International Association for Cryptologic Research (IACR) - Non-profit scientific organisation intended to further research in cryptology.
• International Cryptography Freedom - Links to cryptography related downloads and information from around the world.
• MD5 Reverse Lookup - Project to record and search for mappings of MD5 hashes to their original messages.
• The Munitions Maker Graphic - Campaign to distribute image (rsa2d.gif) in protest of ITAR regulations that treat encryption as munitions.
• An Overview of Cryptography by Gary C. Kessler - Defines cryptographic terms and concepts, offers crypto scheme comparison, and provides some real world examples.
• Randomness and the Netscape Browser - Article about cracking the original Netscape encryption algorithm, and links to resources for generating crypto strength randomness.
• RSA - Hacking and Cracking - Discusses security problems and possible attacks against the RSA cryptosystem.
• Standard Cryptographic Algorithm Naming - Provides references for a collection of cryptographic algorithms, assigning each an ASCII name and zero or more aliases.
• Strong Cryptography Links on the Internet - Dealing with cryptography, information security, cryptographers government, commercial, university, and personal sites, newsgroups, publications, programs and applications.
• Why Cryptography Is Harder Than It Looks - Essay on pitfalls of implementing and using secure systems.