Cryptanalysis of Tzeng-Tzeng Forward-Secure Signature Schemes*This work was supported by the National Natural Science Foundation of China (60403005).

  • Authors:

  • Hong Wang;Gang Qiu;Deng-Guo Feng;Guo-Zhen Xiao

  • Affiliations:

  • The authors are with the State Key Laboratory of Information Security, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China. E-mail: wanghong@is.ac.cn,;The authors are with the National Key Laboratory of ISN, Xidian University, Xi'an 710071, China.;The authors are with the State Key Laboratory of Information Security, Graduate University of the Chinese Academy of Sciences, Beijing 100049, China. E-mail: wanghong@is.ac.cn,;The authors are with the National Key Laboratory of ISN, Xidian University, Xi'an 710071, China.

  • Venue:
  • IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
  • Year:
  • 2006

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Abstract

In PKC'01, Tzeng et al. proposed two robust forward-secure signature schemes with proactive security: one is an efficient scheme, but it requires a manager; the other scheme is a new construction based on distributed multiplication procedures. In this paper, we point out their new distributed multiplication procedure is not secure, thus making the whole new construction insecure. Finally, we present an improved forward-secure signature scheme without a manager.