维吉尼亚（Vigenere）密码为了提高密码的破译的难度，人们有发明一种多表置换的密码，即一个明文字母可以表示为多个密文字母，多表密码加密算法结果将使得对单表置换用的简单频率分析方法失效，其中维吉尼亚密码就是一种典型的加密方法。维吉尼亚密码是使用一个词组（语句）作为密钥，词组中每一个字母都作为移位替换密码密钥确定一个替换表，维吉尼亚密码循环的使用每一个替换表完成明文字母到密文字母的变换，最后所得到的密文字母序列即为加密得到的密文，具体过程如下： 设密钥 ，明文 ， 加密变换 其中 例如，M＝data Security，k＝best。可以先将M分解为长为4的序列data secu rity 每一节利用密钥k＝best加密得密文c=Ek(M)=EELT TIUN SMLR。 当密钥k取的词组很长时，截获者就很难将密文破解。（我们还在计算机上就维吉尼亚密码设计的方法，编写了一个小的程序，可以运用其进行加密和相应的解密。见附录） 由于我们知识和条件所限，本学期对以上6种古典加密方法进行了学习和研究，从中我们收获颇多，我们了解古典密码学的基本原理和方法，并能够对信息进行简单的加密和解密，大大提高我们的学习文化知识的兴趣和热情，如果有条件我们在今后将进一步研究密码学。
上传时间： 2015-03-24
上传用户：songnanhua
一、安装SQL数据库 1、 打开Microsoft SQL Server 企业管理器 2、 建立一个新的数据库，名称为 XfokSite_Free (必须为这个名字) 3、选择该数据库，点击鼠标右键 -> 所有任务 -> 还原数据库 -> 从设备 -> 选择设备 -> 添加 -> 选择程序目录下的数据库里面的文件 二、安装程序 1、如果程序没有放在虚拟目录下，请把所有文件放在网站根目录下，否则会提示出错。 三、设置 1、 用文本编辑器打开web.config 2、 找到<add key="SqlConnectionString" value="Data Source=(local) Integrated Security=false Initial Catalog=XfokSite_Free User ID=xfok Password=xfok" /> 红色部分：数据库服务器地址，如果为本地地址，请设置为(local)，外部请直接修改为IP地址（不要加括号） 深红部分：数据库名称 粉红部分：SQL数据库登陆用户名 蓝色部分：SQL数据库登陆密码 四、设置完毕！ 直接在浏览器中敲入地址，来体验一下心随我动，网站建设超轻松的快感吧！
上传时间： 2015-04-15
上传用户：璇珠官人
Software Testing, Second Edition provides practical insight into the world of software testing and quality assurance. Learn how to find problems in any computer program, how to plan an effective test approach and how to tell when software is ready for release. Updated from the previous edition in 2000 to include a chapter that specifically deals with testing software for Security bugs, the processes and techniques used throughout the book are timeless. This book is an excellent investment if you want to better understand what your Software Test team does or you want to write better software.
标签： practical Software provides software
上传时间： 2015-04-30
上传用户：bjgaofei
JBoss, one of the leading java Open Source groups, integrates and develops these services for a full J2EE-based implementation. JBoss provides JBossServer, the basic EJB container, and Java Manage Preface 18 Great Events of the Twentieth Centuryment Extension (JMX) infrastructure. It also provides JBossMQ, for JMS messaging, JBossTX, for JTA/JTS transactions, JBossCMP for CMP persistence, JBossSX for JAAS based Security, and JBossCX for JCA connectivity. Support for web components, such as servlets and JSP pages, is providedby an abstract integration layer. Implementations of the integration service are provided for third party servlet engines like Tomcat and Jetty. JBoss enables you to mix and match these components through JMX by replacing any component you want with a JMX compliant implementation for the same APIs.
标签： integrates develops services leading
上传时间： 2014-11-03
上传用户：wsf950131
几本java p2p 安全的电子书，A Survey of Peer-to-Peer Security Issues.pdf
上传时间： 2014-12-06
上传用户：aig85
java的加密样例代码， import java.math.BigInteger import java.Security.KeyPair import java.Security.cert.* import java.util.*
上传时间： 2015-06-10
上传用户：大融融rr
WebServices_WebSphere_Version_5 Objectives § Web Services Overview • What are Web Services? • Roles and Functions of Web Services § Web Services Runtime • Base Support • IBM WebSphere UDDI Registry (Private UDDI) • Web Services Gateway (WSGW) § Problem Determination § Web Services Security § Technical Previews § Summary
标签： Services WebServices_WebSphere_Version Objectives Web
上传时间： 2015-06-15
上传用户：cx111111
This book offers 226 code recipes applicable to a variety of difficulties that may arise in the process of application development. Topics covered include XML processing, Windows forms, database access, networking, runtime Security, cryptography and more.
标签： difficulties applicable recipes variety
上传时间： 2015-07-21
上传用户：朗朗乾坤
本源码为OpenNETCF源代码，包含了Diagnostics,IO,Multimedia,Runtime,Security,Threading,Win32等各种用于windows mobile开发的扩展类源代码，对于移动开发者是个好东西。
上传时间： 2015-08-22
上传用户：zhaiyanzhong
This project attempts to implement a Database using B+Tree. The project has developed a DATABASE SYSTEM with lesser memory consumption. Its API includes simple SQL Statements and the output is displayed on the screen. Certain applications for which several features of existing databases like concurrency control, transaction management, Security features are not enabled. B+Trees can be used as an index for factor access to the data. Help facility is provided to know the syntax of SQL Statements.
标签： project implement developed Database
上传时间： 2013-12-25
上传用户：semi1981
