A pairing-based signcryption scheme using self-certified public keys

  • Authors:
  • F. Li;X. Xin;Y. Hu

  • Affiliations:
  • University of Electronic Science and Technology of China, Chengdu, Sichuan, PRC;Zhengzhou University of Light Industry, Zhengzhou, Henan, PRC;Xidian University, Xi'an, Shaanxi, PRC

  • Venue:
  • International Journal of Computers and Applications
  • Year:
  • 2007

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Abstract

In recent years, many pairing-based signcryption schemes have been proposed. There is, however, an inherent weakness in these schemes: the private key escrow problem, in which the "trusted" private key generator (PKG) can easily impersonate any user at any time without being detected. In this paper we present a pairing-based signcryption scheme using self-certified public keys. In our scheme, users can choose their private keys independently. The public keys of users can be implicitly verified with the subsequent signature verification in a logically single step. A trusted PKG is no longer required. If the dishonest PKG impersonates an honest user to communicate with others, the user can provide a proof of treachery of the PKG afterwards, which is similar to certificate-based systems.