journal6 ›› 2006, Vol. 27 ›› Issue (6): 31-33.

• Computer • Previous Articles     Next Articles

Remarks on a Proxy Signature with Proxy Signer Privacy Protection


  1.  (College of Mathematics and Computer Science,Jishou University,Jishou 416000,Hunan China)
  • Online:2006-11-25 Published:2012-06-28

Abstract: A proxy signature with proxy signer privacy protection is proposed by Fu-Kou-Xiao,which has two characteristics listed as follows:the proxy signer’s identity is hidden behind an alias;the anonymity can be revoked when it is need to identify the proxy signer without a trusted third party.In this paper,the authors show that Fu-Kou-Xiao’s scheme is insecure.The original signer may use the capability of proxy signature freely.Also the proxy signer can repudiate a valid proxy signature generated by himself.Therefore,the scheme does not satisfy the properties of undeniable and misuse of the proxy signature.

Key words: proxy signature, proxy signature with proxy signer privacy protection, anonymity revocation, misuse of the proxy signature, strong undeniability

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