Lecture 19: May 10, 2021

Reading: text, §10.4, 11.1–11.2
Due: Homework 3, due May 10, 2021 (Note new due date)

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

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

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ECS 135, Computer Security Version of May 11, 2021 at 11:11PM

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