Lecture 16: May 4, 2026

Reading: text, §12.5.3, 13.1–13.3.1
Assignments: Homework 3, due May 11, 2026

1. Greetings and felicitations!

2. TLS security

3. Authentication
   1. Validating client (user) identity
   2. Validating server (system) identity
   3. Validating both (mutual authentication)
   4. Basis: what you know/have/are, where you are

4. Passwords
   1. Problem: common passwords
   2. Ways to force good password selection: random, pronounceable, computer-aided selection

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

ECS 153A, Computer & Information Security & Privacy I Version of May 4, 2026 at 9:42PM

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