Lecture 28 Outline

Reading: §17^*
Assignments: Homework 5, due Dec. 2

1. General notes
   1. Homework 5, question 2 has been corrected. Do not do the earlier version!
   2. Lab 4 has been graded and returned (on Canvas). Please resubmit any changes by 11:59pm December 2 (on Friday). You can recover up to 80% of the points you lost for correctness and style.
2. Compiler-based mechanisms
   1. Exceptions
   2. Concurrency
3. Run-time mechanisms
   1. Fenton’s data mark machine
   2. Variable variable classes
4. Tainting
5. Firewalls