Analysis and Improvement of a Prozy Blind Multi-signature Scheme without a Secure Channel

摘要：

Proxy blind signature is a cryptographic research hotspot, and has been applied in many occasions. Many proxy blind signature schemes were proposed, however, all the schemes rely on secure channels to transmit proxy secret key. Therefore, Lu, Cao and Zhou proposed a new proxy blind multi-signature scheme recently, which does not need a secure channel and is provably secure under the random oracle model. In this letter, however, we show that their scheme is not secure against the original signers forgery attack. Moreover, we give four improved proxy key generation algorithms to counter this attack.

关键词： cryptography prozy signature blind signature

作者: Ying Sun Chunxiang Xu Qi Xia Yong Yu

作者单位: School of Computer Science and Engineering,University of Electronic Science and Technology of China,Chengdu,610054,PR China

会议类型: 国际会议

会议名称: The Fifth International Conference on Information Assurance and Security(第五届信息保障与安全国际会议)

会议地点: 西安

会议语种:英文

页码: 661-664

在线出版日期: 2009-08-18（万方平台首次上网日期，不代表论文的发表时间）