Universally Composable Proactive Threshold RSA Signature  

作　　者：洪璇 陈克非 龙宇 

机构地区：[1]Computer Science and Engineering Department Shanghai Jiaotong University,Shanghai 200240,China

出　　处：《Journal of Shanghai Jiaotong university(Science)》2008年第6期659-663,共5页上海交通大学学报（英文版）

基　　金：the National Natural Science Foundation of China (Nos. 60573030, 90704004);the National Basic Research Program (973) of China(No. 2007CB311201)

摘　　要：Recently some efforts were made towards capturing the security requirements within the composable security framework. This modeling has some significant advantages in designing and analyzing complex systems. The threshold signature was discussed and a definition was given based on the universal composability framework, which is proved to be equivalent to the standard security definition. Furthermore, a simple, efficient and proactive threshold RSA signature protocol was presented. It is proved to be correct, consistent and unforgeable relative to the environment that at most t - 1 parties are corrupted in each proactive stage. It is also secure under the universal composability framework. It is a UC based security and is proved to be equivalent to the standard security.Recently some efforts were made towards capturing the security requirements within the composable security framework.This modeling has some significant advantages in designing and analyzing complex systems.The threshold signature was discussed and a definition was given based on the universal composability framework, which is proved to be equivalent to the standard security definition.Furthermore, a simple, effcient and proactive threshold RSA signature protocol was presented.It is proved to be correct, consistent and unforgeable relative to the environment that at most t-1 parties are corrupted in each proactive stage.It is also secure under the universal composability framework.It is a UC based security and is proved to be equivalent to the standard security.

关 键 词：proactiveness RSA threshold signature universal composability framework 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]