【作者】 鹿钦鹤；

【导师】 任涛；

【作者基本信息】 长春理工大学 ， 计算机软件与理论， 2007， 硕士

【摘要】 随着各种商业和社会业务转化为电子形式在网上进行，各种加密算法的使用，可以保证这些活动的安全性。被NIST选定的AES算法，具有很好的代数结构且具有简洁、高效、安全性高等优点。而椭圆曲线密码体制具有安全性高、速度快、密钥短、实现时所需占用资源少的特点。 本文根据AES算法大量矩阵运算的特点，对加密和解密的轮变换进行了研究，给出了其优化实现，提高了AES算法的加解密速度；并提出了一种将AES算法和椭圆曲线密码(ECC)体制相结合的混合加密体制，从而更为高效地实现了网络通信系统中的信息加密、数据签名和身份验证，解决了密码体制中速度和安全性不能兼顾的问题。更多还原

【Abstract】 As many kinds of commercial and social businesses are transformed into electronic form and are conducted on the network, all kinds of cryptographic algorithms used can insure security of these activities. The Advanced Encryption Standard, which is selected by NIST, has an elegant algebraic structure, and is a good symmetry cryptosystem with its advantages of simplicity, high efficiency and security. And Elliptic Curve Cryptography (ECC) systems, is characterized by higher safety property, faster speed, shorter key lengths and fewer computational resources for implementation than other former traditional public-key algorithms.This paper studies its round transformation equation, and gives a better implementation of AES based on table-looking-up method, proposes its optimized algorithm, which can greatly increase the encrypting/decrypting speed. And proposes the mixed cryptosystem based on the combination of the AES and Elliptic Curve Cryptography, which will actualize encrypt of data, digital signature and identification with high efficiency in Internet communication, and solve the problem of antinomy of speed and security in cryptosystem.更多还原