Password security: a case history

  • Authors:
  • Robert Morris;Ken Thompson

  • Affiliations:
  • Bell Labs., Murray Hill, NJ;Bell Labs., Murray Hill, NJ

  • Venue:
  • Communications of the ACM
  • Year:
  • 1979

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Abstract

This paper describes the history of the design of the password security scheme on a remotely accessed time-sharing system. The present design was the result of countering observed attempts to penetrate the system. The result is a compromise between extreme security and ease of use.