Efficient and Unconditionally Secure Digital Signatures and a Security Analysis of a Multireceiver Authentication Code

  • Goichiro Hanaoka
  • Junji Shikata
  • Yuliang Zheng
  • Hideki Imai
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 2274)


Digital signatures whose security does not rely on any unproven computational assumption have recently received considerable attention. While these unconditionally secure digital signatures provide a foundation for long term integrity and non-repudiation of data, currently known schemes generally require a far greater amount of memory space for the storage of users’ secret information than a traditional digital signature. The focus of this paper is on methods for reducing memory requirements of unconditionally secure digital signatures. A major contribution of this paper is to propose two novel unconditionally secure digital signature schemes that have significantly shortened secret information for users. As a specific example, with a typical parameter setting the required memory size for a user is reduced to approximately 1/10 of that in previously known schemes. Another contribution of the paper is to demonstrate an attack on a multireceiver authentication code proposed by Safavi-Naini and Wang, and present a method to fix the problem of the code.


Smart Card Signature Scheme Secret Information Signed Message Authentication Code 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2002

Authors and Affiliations

  • Goichiro Hanaoka
    • 1
  • Junji Shikata
    • 1
  • Yuliang Zheng
    • 2
  • Hideki Imai
    • 1
  1. 1.Information & Systems, Institute of Industrial ScienceUniversity of TokyoTokyoJapan
  2. 2.Department of Software and Information SystemsUniversity City BlvdCharlotteUSA

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