CS338 Computer Security
Friday, 8 April 2022

+ Questions

+ base64
- "encoding" vs. "encrypting"

+ Schneier, continued
- Small groups (12 minutes)
    - What should I ask him?
    - Where do you think he's not getting it right?
- Reactions to blockchain & surveillance essays?

+ Kick-off to cryptography
- "cryptology" vs. "cryptography" vs. "cryptanalysis"
- Symmetric encryption and keys
- Kerkhoff's Law
- Asymmetric / public-key encryption
- The key exchange problem
- The person-in-the-middle problem (PITM)
- We're not going to prove the relevant theorems

+ Next week
- Symmetric encryption: playing with AES
- Public-key cryptography: playing with RSA
- Key exchange: the Diffie-Hellman process
- Start to read the TLS spec
- Bruce Schneier in class on Friday