Needham-Schroeder protocol

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The term Needham-Schroeder protocol can refer to one of two communication protocols intended for use over an insecure network, both protocols designed by Roger Needham and Michael Schroeder.[1]

The two protocols are:

  1. The Needham-Schroeder Symmetric Key Protocol is based on a symmetric encryption algorithm. It forms the basis for the Kerberos protocol. This protocol aims to establish a session key between two parties on a network to protect their communication.
  2. The Needham-Schroeder Public-Key Protocol, based on public-key cryptography. This is intended to provide mutual authentication between two parties communicating on a network, but in its proposed form it is not secure.

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References[change | edit source]

  1. Needham, Roger; Schroeder, Michael (December 1978), "Using encryption for authentication in large networks of computers.", Communications of the ACM 21 (12): 993-999, doi:10.1145/359657.359659