A high security log-in procedure

  • Authors:
  • George B. Purdy

  • Affiliations:
  • Univ. of Illinois at Urbana-Champaign, Urbana

  • Venue:
  • Communications of the ACM
  • Year:
  • 1974

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Abstract

The protection of time sharing systems from unauthorized users is often achieved by the use of passwords. By using one-way ciphers to code the passwords, the risks involved with storing the passwords in the computer can be avoided. We discuss the selection of a suitable one-way cipher and suggest that for this purpose polynomials over a prime modulus are superior to one-way ciphers derived from Shannon codes.