Outline for November 12, 2025

Reading: text, §24.2.11, 23.1–23.4
Assignments: Homework 4, due November 21; Completed Project, due December 9

1. Greetings and Felicitations!

2. Penetration testing debate

3. What is malware?

4. Trojan horse
   1. Rootkits
   2. Propagating Trojan horses

5. Computer virus
   1. Brief history
   2. Structure of a computer virus
   3. Infection vectors: boot sector, executable, multipartite, macro
   4. Concealment: TSR, stealth, encrypted, polymorphic, metamorphic

6. Computer worms

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

ECS 235A, Computer and Information Security Version of November 13, 2025 at 4:16PM

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