J4 ›› 2010, Vol. 37 ›› Issue (1): 107-112+147.doi: 10.3969/j.issn.1001-2400.2010.01.019

• Original Articles • Previous Articles     Next Articles

Security analysis of two forward-secure blind signature schemes

QIU Gang1;WANG Hong2;XIAO Hong1;XIAO Guo-zhen1
  

  1. (1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an  710071, China;
    2. Dept. of Computer Sci. and Tech., Huaibei Coal Normal College, Huaibei  235000, China)
  • Received:2008-10-17 Online:2010-02-20 Published:2010-03-29
  • Contact: QIU Gang E-mail:gang_qiu@yeah.net

Abstract:

Forward-secure blind signature schemes can provide important security guarantees: all secret keys and digital signatures before current key exposure will still be secure. We make a Security analysis of the recent two new forward-secure blind signature schemes respectively proposed by Hui-Feng Huang et al and Yali Liu et al. These schemes are totally broken by cryptanalysis on the key structure or hardness problem. It is proved that they are not forward-secure.

Key words: cryptography, security of data, blind signature, forward security, key exposure