It uses symmetric and cryptographic algorithms like data encryption standard ( des ) , and triples des to encrypt the payload . together , the ipsec esp and ah protocols provide privacy , integrity , and authentication of ip packets Esp利用对称加密算法(如des ,三重des )加密有效载荷。 ah与esp一起为ip包提供机密性,完整性和身份源认证服务。
But at present , many mobile banking systems only use some cryptographic algorithms as security measures , without depicting the procedure of message exchanging as a secuity protocol , needless to say how to analyze it or provide the correctness proof of it 但目前很多手机银行系统中只是简单的使用了若干密码算法作为安全措施,没有把消息交换过程抽象描述成安全协议的形式,更谈不上对其进行形式化的分析证明。
Because of the importance of non - repudiation to electronic commerce activities and the fact that non - repudiation protocol is relatively few , this paper adopts the modern cryptographic algorithms and techniques and designs a mutually undeniable cryptographic protocol 介于不可否认协议对电子商务活动开展的重要性以及不可否认协议相对较少这一事实,利用现有的密码算法与密码技术,提出一种改进的双方不可否认密码协议方案。
With the fast development of internet applications , information security has beome more and more important . the problem of the trustworthiness and security has also been more and more important . so we need best digital signature algorithm and cryptographic algorithm 随着网络逐步成为社会的主要神经,网络上的诚信问题和安全问题日益备受关注,数字签名是网络用户实现电子签名的主要手段,为用户提供了诚信和安全的保障。
It goes without saying the importance of network and information se - curity . now , about communication and information security has come to people ' s attention . study cryptographic algorithms and protocols is a very important research subject , which is the core technique of the information security - cryptography 病毒,黑客,网络犯罪给网络用户造成的危害也越来越大。网络与信息安全的重要性不言而喻。因此,保密通信和信息安全越来越受到人们的重视。
Therefore , in this thesis , we investigate the runtime environment of mobile banking systems , study the design and analysis methods of security protocols and the security properties of cryptographic algorithms required , choose a suite of cryptographic algorithms deliberately , and hereby propose a security protocol for mobile banking services - the mb protocol 为此,本文深入研究了手机银行的运行环境,安全协议的设计和分析方法及协议所需密码算法的安全性质,精心选择了一套包括分组密码、公钥密码、 hash函数和数字签名的密码算法。
As regards cryptographic algorithm , according to database encryption requirement for cryptosystem , we adopt block cipher , which is high intensity and fast , based on analysing and comparing several popular cryptographic algorithm ; and resolve cipher message expansion problem through making improvement of block cipher with " cipher message whmovement " 在数据的加密算法上,本文在分析比较目前常用的加密算法的基础上,依据数据库加密对密码系统的要求,采用了保密强度大且速度快的分组密码;并用“密文挪用法”对分组密码进行改进,解决了加密后数据扩张的问题。