Outline for May 26, 2005

1. Classical Ciphers
   1. DES
2. Public-Key Cryptography
   1. Properties
   2. Diffie-Hellman
   3. RSA
3. Cryptographic Hashes
4. Access Control Mechanisms
   1. Access control lists
   2. Capabilities
   3. Locks and Keys
   4. Type checking
   5. Ring-based access control
   6. PACLs