Improve and Secure a Mediated Certificateless Signature Scheme

摘要：

Certificateless public key cryptography can be viewed as a model that is intermediate between traditional public key cryptography and identity-based public key cryptography.Mediated certificateless cryptography equips certificateless cryptography with instantaneous revocation function.Yang et al.recently proposed an efficient mediated certificateless signature scheme and claimed that their scheme is secure.This paper shows that their scheme suffers from the key replacement attack.An improved scheme is subsequently proposed and formal security proof presented in the paper demonstrates that the improved scheme is existentially unforgeable against fully- adaptive chosen message attack in the random oracle model. With our complementary efforts,the improved mediated scheme is provably secure.

关键词： Mediated Certificateless Signature Certificateless Public Key Cryptography Cryptanalysis Security Model Pairing

作者: Xuezhong Qian Xu Wang

作者单位: School of Information Technology,Jiangnan University,Wuxi 214122,China

会议类型: 国际会议

会议名称: 2008年国际电子商务、工程及科学领域的分布式计算和应用学术研讨会(2008 International Symposium on Distributed Computing and Applications for Business Engineering and Science)

会议地点: 大连

会议语种:英文

页码: 1079-1084

在线出版日期: 2008-07-27（万方平台首次上网日期，不代表论文的发表时间）