How to broadcast a secret

  • Authors:
  • Shimshon Berkovits

  • Affiliations:
  • University of Lowell and The MITRE Corporation, Bedford, MA

  • Venue:
  • EUROCRYPT'91 Proceedings of the 10th annual international conference on Theory and application of cryptographic techniques
  • Year:
  • 1991

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Abstract

A single transmitter wishes to broadcast a secret to some subset of his listeners. He does not wish to perform, for each of the intended recipients, a separate encryption either of the secret or of a single key with which to protect the secret. A general method for such a secret broadcasting scheme is proposed. It is based on "k out of n" secret sharing. An example using polynomial interpolation is presented as well as a related vector formulation.