代理盲签名及其应用研究

发布时间：2018-04-27 11:35

本文选题：代理签名 + 盲签名　；参考：《陕西师范大学》2008年硕士论文

【摘要】： 数字签名是密码学中重要的组成部分,是信息完整性、真实性的理论基础,随着计算机网络的不断发展,普通的数字签名已不能满足人们的需要,许多有着特殊用途的数字签名方案被提了出来,如盲签名、代理签名、代理盲签名等。 1983年Chaum提出了盲签名方案,盲签名是指签名者在签名前后都不知道签名消息的具体内容,它对待签名消息具有保护功能。1996年,Mambo等人提出了代理签名方案,代理签名是指一个被指定的代理签名者可以代表原始签名者生成有效的签名,它可以保证在原始签名者不在或不方便做出签名时也能生成有效的签名。2002年,谭作文等人提出了代理盲签名方案,代理盲签名既具有代理签名的特性又具有盲签名的特性。代理盲签名作为新型的签名技术已在电子支付系统、移动代理系统、电子投票、电子拍卖、电子商务和网络安全等方面有广泛的应用前景。本文在分析原有代理签名和盲签名的基础上,对代理盲签名及其应用进行研究,并针对代理盲签名在电子现金中的应用,提出了相应的解决方案。本文所取得的主要研究成果如下: 1.对谭作文等代理盲签名方案的安全性进行了分析。分析表明,该方案虽然满足一些代理盲签名的基本性质,但仍存在一些安全缺陷。如:原始签名人的伪造攻击、伪造代理盲签名、更改原始签名人或代理签名人、不具有不可追踪性。针对这些安全缺陷,我们提出了一个改进的方案。 2.基于Okamoto-Schnorr盲签名方案构造了一个新的代理盲签名方案。新方案具有代理签名的权力委托和盲签名的匿名性与不可追踪性的特点,代理密钥的传输不需要使用安全的秘密通道,可在公共信道上进行。 3.结合代理签名与盲签名的优点,利用椭圆曲线上的Weil双线性映射,提出了一个新的基于身份的代理盲签名方案。该方案利用以用户的身份为基础的公钥代替了以数字证书为基础的公钥,节约了验证签名的时间开销,减少了交互的次数并节省了存储空间。 4.基于代理多重签名与盲签名,提出了一个新的基于身份的代理多重盲签名,即一个代理签名人能够代表多个原始签名人进行代理盲签名。它综合了多重代理签名和盲签名的优点,能够有效的防止授权人冒充多重代理人对消息进行签名。 5.将新的代理盲签名方案具体的应用于电子现金中,提出了新的电子现金方案,指出了新的代理盲签名方案具有良好的现实应用价值。
[Abstract]:Digital signature is an important part of cryptography, it is the theoretical basis of information integrity and authenticity. With the development of computer network, ordinary digital signature can no longer meet the needs of people. Many special purpose digital signature schemes have been proposed, such as blind signature, proxy signature, proxy blind signature and so on. Chaum proposed a blind signature scheme in 1983. Blind signature means that the signer does not know the specific contents of the signature message before and after signing, and it has the function of protecting the signature message. In 1996, Chaum et al put forward a proxy signature scheme. Proxy signature means that a designated proxy signer can generate a valid signature on behalf of the original signer, which can guarantee the generation of a valid signature when the original signer is absent or inconvenient. Tan proposed a proxy blind signature scheme. Proxy blind signature has both the characteristics of proxy signature and blind signature. As a new signature technology, proxy blind signature has been widely used in electronic payment system, mobile agent system, electronic voting, electronic auction, electronic commerce and network security. Based on the analysis of the original proxy signature and blind signature, this paper studies the proxy blind signature and its applications, and proposes a corresponding solution to the application of proxy blind signature in electronic cash. The main research results obtained in this paper are as follows: 1. The security of proxy blind signature schemes such as Tan composition is analyzed. The analysis shows that although the scheme satisfies the basic properties of some proxy blind signatures, it still has some security defects. For example: forgery attack by original signer, forgery of proxy blind signature, modification of original signer or proxy signer, it is not traceable. In view of these safety defects, we propose an improved scheme. 2. A new proxy blind signature scheme based on Okamoto-Schnorr blind signature scheme is proposed. The new scheme is characterized by the anonymity and non-traceability of proxy signature power delegation and blind signature. The transmission of proxy key does not need to use a secure secret channel and can be carried out on a common channel. 3. Combining the advantages of proxy signature and blind signature, a new identity-based proxy blind signature scheme is proposed by using Weil bilinear mapping on elliptic curves. The scheme uses the public key based on the user's identity to replace the public key based on the digital certificate, saves the time cost of verifying the signature, reduces the number of interactions and saves the storage space. 4. Based on proxy multi-signature and blind signature, a new identity-based proxy multi-blind signature is proposed, in which a proxy signer can perform proxy blind signature on behalf of multiple original signers. It combines the advantages of multi-proxy signature and blind signature, and can effectively prevent the licensor from impersonating multiple agents to sign messages. 5. The new proxy blind signature scheme is applied to electronic cash, and a new proxy blind signature scheme is proposed. It is pointed out that the new proxy blind signature scheme has good practical value.
【学位授予单位】：陕西师范大学
【学位级别】：硕士
【学位授予年份】：2008
【分类号】：TN918.1

【引证文献】