Robust Forward-Secure Signature Schemes with Proactive Security

  • Authors:
  • Wen-Guey Tzeng;Zhi-Jia Tzeng

  • Affiliations:
  • -;-

  • Venue:
  • PKC '01 Proceedings of the 4th International Workshop on Practice and Theory in Public Key Cryptography: Public Key Cryptography
  • Year:
  • 2001

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Abstract

The secret key of a forward-secure signature scheme evolves at regular intervals, but the public key is fixed during the lifetime of the system. This paper enhances the security of Abdalla and Reyzin's forward-secure signature scheme via threshold and proactive mechanisms. In our threshold forward-secure signature scheme, we combine multiplicative and polynomial secret sharing schemes to form a threshold forward-secure signature scheme. We develop a special proof system to prove robustness of our scheme.