数据加密算法

That the larger the chunk size the more secure the encryption -- ideally you would like to encrypt a file in a single data chunk to take full advantage of Rijndael's block chaining functionality

越大的块大小更安全的加密-理想您想在一个加密的数据块文件利用Rijndael算法的块充分利用链接功能

It must improve the commonly symmetrical key block cipher arithmetic for ensuring that the data length will not be increased after encryption: using forward shift bits mode in Triple DES with Two Keys; using cipher text stealing mode in RC5 with Cipher Block Chaining.

为保证加密后数据长度不变，应对常用的对称密钥分组密码算法以改进：双密钥三重DES加密采用向前挪位法，RC5密码分组链接加密采用密文窃取方式。

The design includes many new technologies in data exchange and data security, they are: Converting non-XML data to XML in order to apply the XML security technology to more data types; Using the technology of XKMS and PKI to manage the public key in order to overcome the shortage of complexity and difficulty in using PKI and improve the efficiency of the public key management; Using Diffe-Hellman algorithm combining with the public key technology to exchange secret key in order to furthest increase the security of the key; Using the technology of XML digital signature algorithm to ensure the integrity, message authentication and signer authentication of the data; Using the technology of XML encryption to ensure confidentiality of the data; Defining delegable access rules on the structure and content of the XML documents to provide fine-grained access control. According to the XML security framework, a XML security library is designed and implemented.

在对XML及其安全技术主要包括XML加密技术、XML数字签名、公钥管理、密钥产生和交换进行研究的基础上，结合传统密码技术和XML安全技术提出了一种基于XML的数据安全模型，模型中包含了目前网络数据交换和安全领域的一系列最新技术，主要有：将非XML格式数据转换为XML格式数据的方法，以保证现有的大部分网络数据能够应用XML安全技术；使用XML公钥管理技术结合PKI技术管理公钥，以克服PKI技术实施和部署复杂、难度大等问题，提高公钥管理的效率；使用Diffie-Hellman算法结合公钥技术交换密钥，以最大限度保证密钥的安全；使用XML数字签名技术保证数据的完整性、不可否认性和发送方身份认证；使用XML加密技术保证数据的机密性；根据XML文档的内容和结构定义授权访问规则进行良好的访问控制。

This paper presents a new method of digital image sharing.Firstly,construct a reversible matrix,decompose a secret image into several scrambling and encryption images at one time by matrix operation,then camouflage them into several megascopic and meaningful carrier images to store or transfer.This algorithm combines the scrambling technique,encryption technique,information hiding and sharing technique,but with much simpler algorithm,less computation time,smaller pixel expansion,better recovery effect.The results show that the algorithm has application value in the field of secret image storage and transmission.

提出一种数字图像分存方法，首先构造可逆矩阵，并通过矩阵运算直接将秘密图像分解成几幅等大小的置乱加密图像，然后分别将它们伪装在几幅经过放大且有意义的载体图像中，实现了图像分存，文中将置乱加密、信息隐藏、分存技术三者有机结合，整个算法实现简单，运算量小，数据膨胀率低，安全性高，秘图恢复效果较好，大量实验也验证了算法的有效性。

The main features of this paper is: nothing to do with the platform, this system can be compatible with the majority of software and hardware used by the platform, as well as various database platform, shielding the differences of hardware and software platform such as network, operating systems, databases, application systems and so on, so that enterprises and institutions could achieve seamless, transparent data exchange through data exchange system; Java technology used to develop the system transplantability; using data exchange center to achieve centralized data processing, different data format conversion, increased system scalability; from data transmission, authentication, access control, encryption and more news content log-class areas enhanced data exchange system security; using DES and RSA algorithm , increased the confidentiality of data transmission; create WrapperTimer category achieved data transmission timing implementation and reduce the dependence on artificial.

设计的系统与平台无关，能兼容企业所用的大多数软硬件平台，以及各种数据库平台，屏蔽网络、操作系统、数据库、应用系统等软硬平台的差异，使企事业单位通过数据交换系统实现无缝的、透明的交换数据；采用数据交换中心来实现数据的集中处理、不同数据格式的转换，增加了系统的可扩展性；从数据传输、身份认证、权限控制、消息内容加密和多级日志等多方面增强数据交换系统的安全性；用DES和RSA算法对XML文件或XML文件中的元素进行加密，增加传输数据的保密性；创建WrapperTimer类实现了数据传输的定时执行，降低了对人工的依赖性。

In the symmetrical encryption system aspect, discussed the des algorithm with emphasis, has given it in the key management, the safe application aspect exists question; the problem which in the asymmetrical encryption system aspect, studies in with emphasis which rsa and the application has the question, the ecc merit and should pay attention and so on.through the quite symmetrical key encryption system and the public key encryption system good and bad points,summarize should use the mix key encryption system in the electronic commerce, both guarantee data security, and may enhance encrypts and deciphers the speed.

在对称加密体制方面，重点讨论了des 算法，给出了其在密钥管理、安全应用方面存在的问题；在非对称加密体制方面，重点研究rsa及其应用中存在的问题、ecc的优点及应注意的问题等。通过比较对称密钥加密体制和公开密钥加密体制的优缺点，总结出在电子商务中应采用混合密钥加密体制，既保证数据安全，又可提高加密和解密速度。

It utilizes strong and time-proven encryption algorithm to provide you with peace of mind that your data is safe.

它利用强和时间验证的加密算法对向你提供一个平静的心态，你的数据是安全的。

Storing the biometric data as an algorithmic encryption makes it impossible for even the most sophisticated fraudster to read or substitute.

存储生物数据的加密算法使得即使是最复杂的欺诈读取或替代品。

The paper also presents the ways of realizing the safety framework: password algorithm of data encrypts, establishing mobile terminal through WTLS, CA and WIM, basic safety facilities based on WPKI, the establishment of safety relations between Web server and WAP net gate; how to avoid the safety guarantee for safe terminal to terminal business in the current network environment .

详细介绍了实现安全构架的若干关键问题：数据加密理论的密码算法，通过WTLS、CA、WIM建立移动终端，基于WPKI基础安全设施，Web服务器和WAP网关之间安全信任关系的建立；在目前网络环境下，如何避免WTLS协议和网关的安全缺陷，实现端到端的安全交易保障，等等。

Lastly, this paper analysis the safety problems that may happened between WAP terminal and data center when they are communicating. In addition, this paper proposes a encryption algorithm based on the theory of shared secret key in order to improve the wireless protocol.

本文最后针对ITS中WAP终端与数据中心通信的环节上可能出现的安全隐患做了分析，同时也提出了一个基于共享密钥的加密算法对移动协议进行了改进。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。