Outline for October 16, 2023

Reading: text, §10.5, 11.1–11.2, 12.1, 12.4
Due: Homework 2, due October 23; Background Research, due October 27

1. Digital Signatures
   1. Judge can confirm, to the limits of technology, that claimed signer did sign message
   2. RSA digital signatures: sign, then encipher, then sign
   3. El Gamal digital signatures

2. Session and interchange keys

3. Key Exchange
   1. Needham-Schroeder and Kerberos
   2. Public key; man-in-the-middle attacks
   3. The discrete log problem and Diffie-Hellman

4. Attacks
   1. Precomputation
   2. Misordered blocks
   3. Statistical regularities
   4. Type flaw

5. Networks and cryptography
   1. Link vs.end-to-end encryption

Matt Bishop Office: 2209 Watershed Sciences Phone: +1 (530) 752-8060 Email: mabishop@ucdavis.edu

ECS 235A, Computer and Information Security Version of October 15, 2023 at 10:56PM

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