Cyphernomicon  
   Tim May's CryptoNotes, and an introduction to the Cypherpunks.
   http://www2.pro-ns.net/~crypto/cyphernomicon.html

The Munitions Maker Graphic  
   Campaign to distribute image (rsa2d.gif) in protest of ITAR regulations that treat encryption as munitions.
   http://online.offshore.com.ai/arms-trafficker/rsa2d.html

Cypherpunks  
   Group, with mailing list, that is interested in privacy and cryptography.
   ftp://ftp.csua.berkeley.edu/pub/cypherpunks/mailing_list/index.html

Strong Cryptography Links on the Internet  
   Dealing with cryptography, information security, cryptographers government, commercial, university, and personal sites, newsgroups, publications, programs and applications.
   http://www.c4i.org/erehwon/crypto.html

Choosing a Good Password  
   Tips on choosing a difficult to crack password and pitfalls in password selection.
   http://www.cs.umd.edu/faq/Passwords.shtml

Coderpunks  
   Little sister of the cypherpunk mailing list. Discussion of implementations of strong, robust cryptosystems.
   http://home.att.net/~lewis.mccarthy/InfosecProjects/Coderpunks/

RSA - Hacking and Cracking  
   Discusses security problems and possible attacks against the RSA cryptosystem.
   http://members.tripod.com/irish_ronan/rsa/

Handbook of Applied Cryptography  
   Reference work available for free download (with restrictions) from the Web.
   http://www.cacr.math.uwaterloo.ca/hac/

Crypto-Gram  
   Free monthly email newsletter covering developments in cryptography and other computer security issues.
   http://www.counterpane.com/crypto-gram.html

International Association for Cryptologic Research (IACR)  
   Non-profit scientific organisation intended to further research in cryptology.
   http://www.iacr.org/

Cryptography FAQ  
   Ten part FAQ list that is essential reading for any newcomer to cryptography.
   http://www.faqs.org/faqs/cryptography-faq/

Cryptography World  
   Introduction to cryptography, including concepts, key management and application.
   http://www.cryptographyworld.com

Polymorphic Cipher Theory  
   Article by C. B. Roellgen discussing a class of self-compiling symmetric encryption algorithms.
   http://www.ciphers.de/products/polymorphic_cipher_theory.html

Cryptonomicon  
   Cryptography related articles, downloads, news, links and discussions.
   http://www.cryptonomicon.net/

Adam Back's Homepage: Cypherspace  
   Find information on some cryptanalytic hacks, breaking weak cryptosystems and links to more cryptography related websites.
   http://cypherspace.org/adam/

International Cryptography Freedom  
   Links to cryptography related downloads and information from around the world.
   http://www.piracy.com

VB2theMax: Inside Internet Security  
   Extract from chapter 19 of book on Internet security.
   http://www.vb2themax.com/HtmlDoc.asp?Table=Books&ID=5200

Cryptography - An Overview  
   Introduction to cryptography, listing main techniques and algorithms.
   http://www.hack.gr/users/dij/crypto/overview

Home of HB9CUF  
   Free cryptographic tools: CryptoUP to secure and transport any kind of file; FindSR helps to analyze ciphertext.
   http://cryptoup.roenet.ch/

Deschall  
   Articles describing the first crack of a DES-encrypted message, with some source code and mailing list archives.
   http://www.interhack.net/projects/deschall/

Randomness and the Netscape Browser  
   Article about cracking the original Netscape encryption algorithm, and links to resources for generating crypto strength randomness.
   http://www.cs.berkeley.edu/~daw/netscape-randomness.html

A Cryptographic Compendium  
   Outline of the various types of cipher systems that have been used historically and the relationships between them.
   http://fn2.freenet.edmonton.ab.ca/~jsavard/crypto/jscrypt.htm

The Cipher Challenge  
   History of a code cracking competition. Challenge details, how it was solved, winners, essays and photo gallery.
   http://www.simonsingh.net/Cipher_Challenge.html

CryptoMX Tools  
   Set of cryptography tools written entirely in JavaScript, designed to work on any computer with a JavaScript capable browser.
   http://cryptomx.sourceforge.net

Frode Weierud's Cryptology Page  
   History of cryptography, cipher machines and their simulation, cryptanalysis and other code breaking techniques.
   http://frode.home.cern.ch/frode/crypto/

Why Cryptography Is Harder Than It Looks  
   Essay on pitfalls of implementing and using secure systems.
   http://www.schneier.com/essay-037.html

Webcogs: Password Generator  
   Generates semi-pronounceable alphanumeric passwords of 6 to 10 characters (generation method outlined).
   http://www.webcogs.com/passwordgenerator.aspx

An Overview of Cryptography by Gary C. Kessler  
   Defines cryptographic terms and concepts, offers crypto scheme comparison, and provides some real world examples.
   http://www.garykessler.net/library/crypto.html

Standard Cryptographic Algorithm Naming  
   Provides references for a collection of cryptographic algorithms, assigning each an ASCII name and zero or more aliases.
   http://www.users.zetnet.co.uk/hopwood/crypto/scan/

Crypt0graphy Research Labs  
   Features cryptography related articles and services by company that provides personalized cryptography solutions for businesses.
   http://cryptanalysis.biz

Crypto Machines  
   Features machines and systems used in secure communications. Includes brief history on cryptography.
   http://www.jproc.ca/crypto/

MD5 Reverse Lookup  
   Project to record and search for mappings of MD5 hashes to their original messages.
   http://md5.crysm.net