Snake Oil FAQ -  .

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.

Cryptonomicon - - Cryptography related articles, downloads, news, links and discussions.

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.

Home of HB9CUF - - Free cryptographic tools: CryptoUP to secure and transport any kind of file; FindSR helps to analyze ciphertext.

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.