Cryptography
Cryptography (or cryptology) is the practice and study of hiding information. Modern cryptography intersects the disciplines of mathematics, physics, computer science, and electrical engineering. Applications of cryptography include ATM cards, computer passwords, and electronic commerce.
View Bruce Schneier's Blog - Bruce Schneier - Security Technologist
Or take a look at this article on a new development in cryptography - Quantum Cryptography
Please visit our discussion forum to view and contribute to our cryptography work.