Lecture 3: April 3, 2026

Reading: text, §15.5–15.6, 14–14.2.5
Assignments: Homework 1, due April 10, 2026

1. Greetings and felicitations!

2. Hosts
   1. Name
   2. Addresses, network layers
   3. Domain Name System (DNS)
   4. Security issues

3. Identity on the web
   1. Web cookies
   2. Certificates

4. Privacy
   1. What it is
   2. Relationship to confidentiality

5. Principles of secure design
   1. Principle of least privilege
   2. Principle of fail-safe defaults
   3. Principle of economy of mechanism
   4. Principle of complete mediation
   5. Principle of open design

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

ECS 153A, Computer & Information Security & Privacy I Version of April 5, 2026 at 8:25PM

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