基于可视密码的身份认证研究

发布时间：2018-05-28 20:10

本文选题：可视密码 + 身份认证　；参考：《西安电子科技大学》2014年硕士论文

【摘要】：随着网络和高科技技术的日渐普及,越来越多的人利用网络进行各种活动,保证信息的安全就变得尤为重要。身份认证作为信息安全理论重要的组成部分,是使系统避免遭受安全威胁的第一道关卡。身份认证是指验证者通过验证被认证对象的属性(例如,口令、数字签名、数学证明过程、指纹等生理特征),达到确认被认证对象是否有效和属实的目的的一个过程,实际上就是验证某些秘密信息的过程。可视密码是近十余年才慢慢发展起来的新型密码学分支,它与处理数字信息的传统密码学不同,它是针对图像进行加解密的。而且,利用可视密码加解密不需要进行大量复杂的运算,只需将多幅分享图像进行简单的叠加,然后利用人的视觉系统进行解密。对于现在必须进行大量复杂运算的各种密码学技术来说,可视密码无疑是一个新奇有趣,值得深入研究的领域。本文在初步了解了几种主要的身份认证技术的前提下,挑选了简单易行的口令认证和应用广泛的零知识证明身份认证进行了深入了解。分析了口令认证和零知识证明身份认证的优缺点,将可视密码与其相结合,提出了基于可视密码的智能卡口令认证方案和基于可视密码的零知识证明身份认证方案,并进行了仿真,对方案的性能和安全性进行了分析。本文提出的方案与原方案相比,计算复杂度低,安全性高。
[Abstract]:With the increasing popularity of the network and high-tech technology, more and more people use the network to carry out various activities, ensuring the security of information becomes particularly important. As an important part of information security theory, identity authentication is the first level to prevent the system from being threatened by security. Identity authentication is a process that verifies the validity and authenticity of the authenticated object by verifying the attributes of the authenticated object (for example, password, digital signature, mathematical proof process, fingerprint and so on). In fact, it is the process of verifying some secret information. Visual cryptography is a new branch of cryptography which has developed slowly in the past ten years. It is different from the traditional cryptography in dealing with digital information. It is aimed at the encryption and decryption of images. Moreover, the use of visual encryption and decryption does not require a large number of complex operations, only need to share a number of images for a simple superposition, and then use the human visual system to decrypt. Visual cryptography is undoubtedly a novel and interesting field for various cryptographic techniques which must carry out a large number of complex operations. Based on the understanding of several main authentication technologies, this paper selects a simple and easy password authentication and a widely used zero-knowledge proof authentication for in-depth understanding. This paper analyzes the advantages and disadvantages of password authentication and zero-knowledge proof identity authentication, combines visual cipher with it, proposes a password authentication scheme based on visual cipher for smart card and a zero-knowledge proof identity authentication scheme based on visual cipher. The performance and security of the scheme are analyzed by simulation. Compared with the original scheme, the proposed scheme has lower computational complexity and higher security.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN918.1

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