Gary Kessler, a computer networking professor at Champlain College, is the author of this online introduction to cryptography. The material covers three main types of encryption and their applications, trust models, cryptographic algorithms, and much more. One of the most common areas that employs encryption techniques is the Internet, where it allows users to safely transmit private information...

Cryptography is an ancient science, but, with the rise of the information age, computers have brought it to a whole new level. Online privacy and national security both depend on encryption, and maintaining a strong standard is more important than ever. The National Security Agency (NSA) maintains a fun and educational site for kids (1). Children can navigate through Cryptic Manor and solve...

The International Association for Cryptologic Research (IACR) maintains this archive of nearly 400 research papers on various topics in cryptology. Contents date back to 1996, and new material is posted most weeks. Papers generally describe original theories about a certain topic, analyses of cryptologic methods, or proofs of specific equations. Anyone can submit their research for possible...

The Centre for Applied Cryptographic Research at the University of Waterloo, Ontario, Canada and publishers of the Handbook of Applied Cryptography, CRC Press, have recently granted free online access to all chapters of the handbook (.pdf). Written by Alfred J. Menezes, Paul C. van Oorschot, and Scott A. Vanstone, this outstanding resource begins with an overview of cryptography before launching...