A forward-secure certificate-based signature scheme in the standard model

  • Authors:
  • Jiguo Li;Yichen Zhang;Huiyun Teng

  • Affiliations:
  • College of Computer and Information Engineering, Hohai University, Nanjing, China;College of Computer and Information Engineering, Hohai University, Nanjing, China;College of Computer and Information Engineering, Hohai University, Nanjing, China

  • Venue:
  • CSS'12 Proceedings of the 4th international conference on Cyberspace Safety and Security
  • Year:
  • 2012

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Abstract

To alleviate the influence of key exposure, we combine forward-security with certificate-based cryptography and give formal definitions and the security model of forward-secure certificate-based signatures. Then we propose a forward-secure certificate-based signature scheme, which is proven to be existentially unforgeable against adaptive chosen message attacks in the standard model. Hence, we partially solve the key exposure problem in certificate-based signature scheme and improve the system security.