Provably secure robust threshold partial blind signature  

作　　者：CAO Zhenfu ZHU Haojin LU Rongxing 

机构地区：[1]Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, China

出　　处：《Science in China(Series F)》2006年第5期604-615,共12页中国科学（F辑英文版）

基　　金：supported by the National Natural Science Foundation of China(Grants Nos.60225007 and 60572155);the National Research Fund for the Doctoral Program of Higher Education of China(Grant No.20020248024);the Science and Technology Research Project of Shanghai(Grant Nos.04JC14055 and 04DZ07067).

摘　　要：Threshold digital signature and blind signature are playing important roles in cryptography as well as in practical applications such as e-cash and e-voting systems. Over the past few years, many cryptographic researchers have made considerable headway in this field. However, to our knowledge, most of existing threshold blind signature schemes are based on the discrete logarithm problem. In this paper, we propose a new robust threshold partial blind signature scheme based on improved RSA cryptosystem, This scheme is the first threshold partial blind signature scheme based on factoring, and the robustness of threshold partial blind signature is also introduced. Moreover, in practical application, the proposed scheme will be especially suitable for blind signature-based voting systems with multiple administrators and secure electronic cash systems to prevent their abuse.Threshold digital signature and blind signature are playing important roles in cryptography as well as in practical applications such as e-cash and e-voting systems. Over the past few years, many cryptographic researchers have made considerable headway in this field. However, to our knowledge, most of existing threshold blind signature schemes are based on the discrete logarithm problem. In this paper, we propose a new robust threshold partial blind signature scheme based on improved RSA cryptosystem, This scheme is the first threshold partial blind signature scheme based on factoring, and the robustness of threshold partial blind signature is also introduced. Moreover, in practical application, the proposed scheme will be especially suitable for blind signature-based voting systems with multiple administrators and secure electronic cash systems to prevent their abuse.

关 键 词：threshold signature blind signature improved RSA cryptosystem factoring problem electronic cash. 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]