【作者】 胡振鹏；

【导师】 李志斌；

【作者基本信息】 华东师范大学 ， 计算机应用技术， 2008， 硕士

【摘要】 数字签名是对传统手写签名的模拟，它具有防伪造、防篡改和防抵赖等特点，在电子商务和电子政务中有重要应用。随着数字签名研究的不断深入，近年来在理论和应用研究上相继出现了许多具有特殊性质或特殊功能的数字签名，如盲签名、基于身份签名、门限签名、群签名、多重签名和代理签名等。本文的工作之一是研究“代理多重盲签名”，在分析他人提出的一个代理多重盲签名方案基础上，提出两种高效的新方案，并给出了安全性证明和效率分析。数字签密是一种带加密功能的数字签名，它是公钥加密算法和数字签名在更高层次上的结合。由于其特殊的安全性，数字签密成为近年的一个研究热点。本文工作之二是借助双线性映射构造了一种“基于身份的多接收者代理签密”方案，并分析了方案的安全性和实现效率。更多还原

【Abstract】 A digital signature scheme is analogous to the traditional handwriting signature. Since it achieves unforgeability, integrity and non-repudiation, digital signature plays an important role in E-commerce and E-government. With the development of the digital signature, recently a large number of digital signatures with additional properties have appeared (e.g. blind signature, identity-based signature, threshold signature, group signature, multi-signature and proxy signature). The main goal of the thesis is to study proxy blind multi-signature. Through the analysis of a scheme presented by Lu, we propose two new efficient schemes, the security and efficiency are analyzed as well.Digital signcryption is a new kind of digital signature which integrates public key encryption and signature simultaneously in a logic step. Now signcryption attracts many cryptologists’ interests due to its merits. In the thesis we propose a multi-receiver identity-based proxy signcryption from bilinear pairings. The security and efficiency analysis are also provided.更多还原