1. CIA AAA

2. C I A

3. Confidentiality I A

4. Confidentiality Integrity A

5. Confidentiality Integrity Availability A

6. Confidentiality Integrity Availability Authentication A

7. Confidentiality Integrity Availability Authentication Authorization A

8. Confidentiality Integrity Availability Authentication Authorization Accounting

9. Encryption

10. Symmetric Shared Secret Key - very fast -but, how do I get the key to you first, so we can start using the shared secret key

11. Encryption Asymmetric Key

12. Encryption Asymmetric Key Each party has a key pair, one private and one public SLOW! BUT don’t need to send a secret key

13. Best Solution: Use public\private key pairs initially, just to exchange a secret shared key Switch to the secret key for fast processing! Espionage allegory