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Notes on "Time Based Security"

A book by Winn Schwartau

Disclaimer

This book introduces an interesting idea but it uses 200 pages to describe an idea that could be described in one blog post. You may be disappointed by it.

CH5: A brief history of security models

  • The "Orange Book" introduces the reference monitor, or something that either accepts or denies every access request
  • On a computer, an example may be a process requesting a file descriptor or network socket
  • This kind of mandatory access control made sense for the military but not for the private sector
  • Schwartau calls this an example of a Fortress Mentality, or "prevent everything"

CH8: Fast forward one century

  • Vaults are not 100% secure. They can be broken into
  • The purpose of a vault is not to secure something on its own
  • It's to prevent the robbers from stealing what's inside before the police come

CH9: The PDR security formula

  • Pt > Dt + Rt
  • The amount of time offered by the prevention controls must exceed the amount of time it takes to detect and respond to the attack