Cryptography is present in everyday life, from paying with a credit card to using the telephone. Learn all about making and breaking puzzles in computing.
Syllabus
Perfect Ciphers
What makes certain ciphers perfect.,How the Lorenz Cipher was broken.
Symmetric Encryption
Sending messages when two people share a secret.
Key Exchange
Techniques to establish a shared secret.
Asymmetric Encryption
Exchanging information using public key cryptosystems.