Improvement of One Escrow-free Identity-based Signature

摘要：

In the common identity-based cryptosystem, a trusted party called the private key generator (PKG), is responsible for generating the secret key for each user’s identity. As the PKG knows the secret key for all users, the PKG must be absolutely trustworthy. In a real world scenario, this is not desirable because a malicious PKG can impersonate any user. This is known as the key escrow problem. In EuroPKI’2009, Yuen et al proposed an escrow-free identity-based signature scheme. The scheme has to introduce six generators in the underlying group. This leads to an impressive cost. In this paper, we reduce the quantity of the involved generators as less as possible and improve it. The improved scheme only requires three generators. It saves about 1/2 cost.

关键词： escrow-free identity-based signature bilinear map

作者: Lihua Liu Zhengjun Cao

作者单位: Department of Mathematics, Shanghai Maritime University, China Department of Mathematics, Shanghai University Departement d’informatique, Université Libre de Brux

会议类型: 国际会议

会议名称: 2010 IEEE International Conference Conferenhce on Wireless Communications,Networking and Information Security(2010 IEEE 无线通信、网络技术与信息安全国际会议 WCNIS)

会议地点: 北京

会议语种:英文

页码: 1-5

在线出版日期: 2010-06-25（万方平台首次上网日期，不代表论文的发表时间）