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Broadcast Encryption

  • Amos Fiat
  • Moni Naor
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 773)

Abstract

We introduce new theoretical measures for the qualitative and quantitative assessment of encryption schemes designed for broadcast transmissions. The goal is to allow a central broadcast site to broadcast secure transmissions to an arbitrary set of recipients while minimizing key management related transmissions. We present several schemes that allow a center to broadcast a secret to any subset of privileged users out of a universe of size n so that coalitions of k users not in the privileged set cannot learn the secret. The most interesting scheme requires every user to store O(k log k log n) keys and the center to broadcast O(k 2 log2 k log n) messages regardless of the size of the privileged set. This scheme is resilient to any coalition of k users. We also present a scheme that is resilient with probability p against a random subset of k users. This scheme requires every user to store O(log k log(1/p)) keys and the center to broadcast O(k log2 k log(1/p)) messages.

Keywords

Hash Function Secret Message Security Parameter Broadcast Scheme Broadcast Encryption 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • Amos Fiat
    • 1
    • 2
  • Moni Naor
    • 3
  1. 1.Department of Computer Science, School of MathematicsTel Aviv UniversityTel AvivIsrael
  2. 2.Algorithmic Research Ltd.Israel
  3. 3.Department of Computer Science and Applied MathWeizmann InstituteRehovotIsrael

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