Indentity-based broadcast signcryption

  • Li F
  • Xin X
  • Hu Y
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Abstract

Broadcast encryption schemes allow a center to deliver encrypted data to a large set of users so that only a particular subset of privileged users can decrypt it. Most of previous works about broadcast encryption only provide confidentiality of the message. However, when a broadcast system is composed of multiple broadcasters, it raises an issue of authentication and non-repudiation of the message or broadcaster. This issue is especially important for multicasting in computer networks. In this paper, a new concept called broadcast signcryption by combining the concepts of broadcast encryption and signcryption together is proposed to resolve the authentication and non-repudiation problem in a broadcast system. We also propose an identity-based broadcast signcryption scheme using Chen and Malone-Lee's identity-based signcryption scheme. © 2007 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Broadcast encryption
  • Broadcast signcryption
  • Identity-based cryptography
  • Network security
  • Signcryption

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Authors

  • Fagen Li

  • Xiangjun Xin

  • Yupu Hu

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