L15: Intro to System Security

Materials

Use the raw slides (pdf) before lecture to take notes.

Summary

  • Basics on how a computer boots
  • Ancient OS: no memory protection, all processes equal
  • Process isolation requires two components.
  • Rings of execution (protected mode)
  • Virtual memory
  • Process isolation enables security processes to run
  • Logging
  • File access control
  • Anti-virus and Network intrusion detection