Extended Tiny Encryption Algorithm
1997 - David Wheeler, Roger Needham
This paper addresses some minor flaws in the original TEA.
Tiny Encryption Algorithm
Roger Needham, David Wheeler
This is an excellent little encryption algorithm
Paul Andrew Johnston
This is a collection of pages with information about RSA, MD5, and other cryptography algorithms. Good explanations and source code are given.
2002 - Chris Veness
This example implementation shows how the TEA works. The code includes both the original TEA and the better and simpler Block TEA.
TEA - Tiny Encryption Algorithm
September 2003 - Andreas Jönsson
This little demo shows the simplicity of the TEA, an 128 bit symmetric encryption algorithm. Source code in C++.
KeePass Password Safe
This handy utility helps you remember your passwords. It comes with complete source code. The encryption algorithms used to protect the database are 128bit AES and 128bit Twofish. The hash algorithm SHA-256 is used to generate the 256bit key. Free.
Lot's of information about cryptography. Written in an easily readable way, though without any details on how to implement the algorithms.
Index to source code disks
Here's a long list of source codes for various algorithms used in cryptography.
Seeing RSA Public / Private Key Encryption
Very good article on how RSA encryption works.
Describes how RSA works.
Using the RSA Algorithm for Encryption and Digital Signatures
This article both explains the algorithm and talks about its patent. Most importantly it states that the patent expired on September 20, 2000.