可证明安全的代理盲签名的研究

发布时间：2018-05-22 08:14

本文选题：可证明安全 + 代理盲签名　；参考：《南京航空航天大学》2015年硕士论文

【摘要】：数字签名能够实现身份认证、数据完整性和不可否认性,在电子商务、网络安全通信等系统中发挥着重要的作用。随着人们对电子商务服务的需求越来越高,一些具有特殊性质的数字签名应运而生。代理盲签名作为一种特殊的数字签名,具有代理签名和盲签名的优点,在电子现金、电子投票等领域有着广阔的应用前景。目前大多数代理盲签名方案的安全性证明都是启发分析,没有形式化证明,并且没有考虑多一伪造攻击。另外,在大多数基于代理盲签名的电子现金系统中,电子现金的金额是不可见,而且大多数方案存在恶意用户能伪造跟踪信息的缺陷。因此,根据目前代理盲签名技术的研究现状,本文主要研究在随机预言机模型下的代理盲签名方案及其变种方案,包括代理部分盲签名方案。并针对基于代理盲签名的电子现金方案中存在的缺陷,提出了相应的解决方案。具体研究成果如下:1.针对代理盲签名的安全性需求,本文考虑了原始签名者存在性伪造、代理签名者存在性伪造和多一伪造,利用可证明安全理论,建立了详细的安全模型。提出一个基于双线性对的代理盲签名方案,并在随机预言机模型下,证明了其在选择消息/授权文件攻击下是不可伪造,其安全性可分别归约为计算Diffie-Hellman(Computational Diffie-Hellman,CDH)假设和选择目标CDH(Chosen-Target CDH)假设;由于较少的双线对运算,我们的方案具有较高的效率。2.针对代理盲签名在电子现金应用中存在的不足,提出了一个代理部分盲签名方案。根据Huang的代理签名的安全模型,提出了代理部分盲签名的安全模型,在随机预言机模型下,方案的安全性归约为CDH假设,同时分析此方案满足代理部分盲签名的其他安全需求。3.本文分析了Tan方案,指出该方案存在的缺陷。在所提的代理部分盲签名方案基础上,提出了一个新的电子现金方案。在提取协议中,将电子现金的金额嵌入到公共信息中,实现电子现金金额的可见性;为了防止恶意用户伪造跟踪信息,实现电子现金重复花费检测,用户必须利用知识签名来证明嵌入追踪信息的正确性。分析了方案满足不可重复花费性、不可伪造性、匿名性、实用性,解决了现阶段基于代理盲签名的电子现金所存在的问题。
[Abstract]:Digital signature can realize identity authentication, data integrity and non-repudiation. It plays an important role in electronic commerce, network security communication and other systems. With the increasing demand for e-commerce services, some digital signatures with special properties emerge as the times require. As a special digital signature, proxy blind signature has the advantages of proxy signature and blind signature. It has a wide application prospect in electronic cash, electronic voting and other fields. At present, the security proof of most proxy blind signature schemes is heuristic analysis, without formal proof, and does not consider one more forgery attack. In addition, in most electronic cash systems based on proxy blind signature, the amount of electronic cash is invisible, and most schemes have the defect that malicious users can forge tracking information. Therefore, according to the current research status of proxy blind signature technology, this paper mainly studies proxy blind signature scheme under random oracle model and its variant scheme, including proxy partial blind signature scheme. Aiming at the shortcomings of the proxy blind signature based e-cash scheme, a corresponding solution is proposed. Specific research results are as follows: 1. Considering the security requirements of proxy blind signature, this paper considers the existence forgery of the original signer, the existence forgery of the proxy signer and the multiple forgery. A detailed security model is established by using the provable security theory. A proxy blind signature scheme based on bilinear pairings is proposed. Under the random oracle model, it is proved that the scheme is unforgeable under the attack of selected message / authorization file. The security can be reduced to the assumption of computing Diffie-Hellman(Computational Diffie-Hellman Diffie-Hellman(Computational and the assumption of selecting target CDH(Chosen-Target. Aiming at the shortcomings of proxy blind signature in the application of electronic cash, a proxy partial blind signature scheme is proposed. According to Huang's proxy signature security model, a security model of proxy partial blind signature is proposed. Under the stochastic oracle model, the security reduction of the scheme is assumed to be CDH. At the same time, it is analyzed that the scheme meets other security requirements of proxy partially blind signature. This paper analyzes the Tan scheme and points out its defects. Based on the proposed proxy partially blind signature scheme, a new electronic cash scheme is proposed. In the extraction protocol, the amount of electronic cash is embedded into public information to realize the visibility of the amount of electronic cash, in order to prevent malicious users from falsifying tracking information and to realize the detection of repeated spending of electronic cash, The user must use the knowledge signature to prove the correctness of the embedded tracking information. The scheme meets the requirements of non-repeatable cost, unforgeability, anonymity and practicability, and solves the problem of electronic cash based on proxy blind signature at the present stage.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP309

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