Time-of-check to Time-of-use

• Basically syncronization flaws
• A real problem with modern CPU design (Since instructions are no longer executed in the same order they were requested.
• Also problematic in software programming.
  • Authorization could be granted based on some conditions
  • Later conditions may change (l-user gets fired)
  • User is allowed access based on earlier descision that has been rendered obsolete but has not been updated.