Security

Tom Kelliher, CS42

Dec. 6, 1996

• Becomes more and more important in our networked world.

• Electronic credit card transactions.

1. What is being secured?
   1. Data.

   2. Systems: software integrity and hardware.

2. ``Security through obscurity.''

3. Attacks:
   1. Trojan horse.

   2. Worms, viruses.

   3. Denial of service.

   4. Trap door.

4. Authentication.

5. Encryption (secure communication, digital signatures):
   1. DES.

   2. Clipper chip.

   3. Public key cryptography.