【作者】 池越；

【导师】 赵晓群；

【作者基本信息】 河北工业大学 ， 微电子学与固体电子学， 2004， 硕士

【摘要】 由于互联网上信息传送的不安全性，给电子商务的发展带来一定的负面影响，因此，电子交易中的安全问题备受关注。本文在分析了安全电子交易模型的基础上，讨论了密码算法在安全电子交易模型中的应用问题。 针对密码算法实现的复杂性，结合私钥密码与公钥密码的特点，讨论了用公钥密码管理和分配私钥的密钥，用私钥密码加密和解密被传送的信息。该方案既保证了系统的信息的信息率，又保证了安全性。综合现有的密码技术，本文使用国际公认安全的DES和AES作为私钥密码，使用RSA作为公钥密码。 由于RSA公钥密码算法复杂度高，实时实现有一定困难，故对其计算过程进行了优化。在模指数运算方面：“平方一乘”算法较之模乘算法性能有很大的进步，是RSA中的模指数运算的较为通用的算法。本文讨论了对它的一种改进算法——SMM(Symmetry of Modulo Multiplacation)算法。它的原理是基于乘同佘和平方剩余的对称性。在素性检测方面：将进行素性检测用到的基底固定为(2，3，5，7)，同时将指数2~4指数化，据测试，运行时间大致缩短1/3。更多还原

【Abstract】 There will bring certain of negative influence to the development of the electronic commerce, because of the insecurity of the information delivery on the internet. Therefore, the problem of the secure electronic transaction has been paid to more and more attention. This article will discuss the application research of the cryptology algorithm in the model of the secure electronic transaction based on the analysis of the model of the secure electronic transaction.Aimed at the complexity of the cryptology algorithm, this article discuss the management using the public key cryptology and the private key cryptology distribution, use the private key cryptology encrypt and decrypt the information which to be delivered. This program ensure the information rate and the security. Synthesizing the current cryptology technique, this article use the safety DES and AES which has been international accepted as the private key cryptology, use RSA as the public key cryptology.The realization of the RSA public key cryptology algorithm will has some difficulties, because of the high complexity. Therefore the calculate process has been improved. For the module index calculation. The "square multiply" algorithm has been highly improved compared with the "module multiply" algorithm. The "square multiply" has been widely used in the RSA algorithm. This article discuss another algorithm which has been improved---SMM(Symmetry of Modulo Multiplacation) algorithm. Its principle based on the symmetry of the square surplus and the arithmetical compliment of the multiply. In the plain of the aspect examine: will proceed the base that plain examine to use fix for(2,3,5,7)and made 24 as index number at the same time. According to the test, it’s time almost reduced one-third for the movement.更多还原