基于AXI-Stream接口的AES加密模块设计与验证

结合具体项目对信息安全的需求,研究了AES算法的实现过程。针对算法涉及的数论知识及实现步骤,对加解密算法进行了综合优化。在此基础上,设计了一种基于AXI Stream接口的加密IP核,该IP核主要是针对实际项目中需要对流数据进行快速可靠的加密要求所设计的。结合实际项目场景以及AXI Stream接口特点,IP核的设计可最大限度地减少资源消耗。IP核使用两个通道分别进行加密与解密的并行实现,经过Testbench模型仿真测试以及开发板真实环境的测试,其吞吐率可达1.12Gb/s,完全符合对速率要求较高的项目应用要求。     

NT架构下的加解密文件系统研究

加解密文件系统是在操作系统级保护系统和防止用户敏感数据泄漏的一种有效手段。传统用户层加密系统每次使用需要输入口令,操作繁琐且加解密算法安全性不高;而设备驱动层加密系统紧耦合于操作系统及其组件,实现过程繁杂。在微过滤驱动框架下,提出一种改进的AES算法,利用文件系统过滤驱动实现加解密文件系统。测试结果表明,开启加解密功能后造成的磁盘性能损失是在可以接受的范围以内。     

基于AES加解密系统的设计与实现

基于Windows XP操作系统,利用VC++编程语言,实现了一个基于AES的加解密系统,该系统能对字符串和文件使用AES算法进行正确的加密和解密。     

基于流水线结构的可重构AES算法IP核的硬件实现(英文)

为了提高AES算法中IP核数据的吞吐量并同时减小硬件资源的占用,以达到速度和面积的折中实现,采用混合流水线结构和可重构技术完成了IP核的设计.该设计包括在同一个混合流水线结构的流程中实现了AES算法的加密和解密过程;根据有限域的性质,对AES算法中的Sbox盒进行了优化;结合可重构技术,完成了对AES轮变换的主要构件ShiftRow和MixColumn的优化.本设计在Xilinx Virtex2p xc2vp20-7 FPGA器件上完成,其数据吞吐量达到2.58Gbit/s,所需组合逻辑仅为3 233块,通过与同型号器件上的其他设计进行对比,实现了速度和面积的折中,在吞吐量和面积上都得到了比较理想的结果.     

数据加密群件的设计与实现

介绍了一个数据加解密群件的设计与实现方法,提出了基于XML(eXtensible Markup Language)的加密键管理机制,以及加密键XML文件的结构。该数据加解密群件实现了对加密键的分用户、分用途的管理,能够在企业内部共享加密文件。     

一种增强型文件加密程序设计与实现

目前,个人信息泄露问题十分严重,对敏感和隐私数据进行加密保护是防止个人信息被窃取的有效方法。已有的成熟加密算法如AES及RSA等均面向大规模应用,其算法较为复杂,运行开销也较大。对个人数据而言,可以运用密码学基本原理设计并实现简单的文件加密器对其进行保护。然而,现有的一些文件加密程序过于简易,有的程序甚至在实现上存在漏洞,在时间和资源充足的条件下容易被破解或恢复。设计并实现了一种增强型的文件加密程序,加解密均可用同一程序实现,并可安全高效地对任意类型的文件进行加解密。实验结果显示,该程序能准确地对文件进行加解密,且执行效率高,实用性强。     

VFP数据库中密码加密实现

数据库安全问题是数据库设计者必须考虑的重要问题。为了防止无关人员浏览、修改、破坏数据库，最常用的方法是给数据库应用系统加上密码并对密码进行加密。本文以VFP数据库为例，不仅给出了密码加／解密算法及其具体实现，而且给出了与加／解密相关的用户管理和用户登录部分的具体实现。另外，在保持算法快速、简洁的情况下，采用了一种可变的密钥来加密不同的字符串，增强了算法的安全性。实验结果表明，本文的加密算法是比较安全的，可以满足一般需要保密系统的需要。     

高速通用DES加解密芯片设计与实现

现代网络与通信技术高速发展，对信息安全提出了更高的要求，实现高速可靠的数据加密越来越重要．通过对DES加密技术的研究，优化DES加解密算法，运用流水线技术，采用并行处理，在单片廉价FleA(XC2S50)上设计实现了高速通用的DES加解密芯片．     

一种基于Web服务器的文件加密授权保护系统设计与实现

鉴于Web服务器文件访问中存在的安全隐患,比如文件截取、文件篡改等问题,设计了一种基于Web服务器的文件加密授权保护系统。该系统通过与Web服务器硬件特征码绑定,实现对Web服务器中文件进行加密存储以及对加密文件的修改和访问。系统设计中,采用多种传统的文件加密算法生成加密密钥并实现文件加密和解密功能。其中,利用MD5算法实现由硬件机器码转化生成初始加密密钥的功能,利用RSA算法实现由初始加密密钥转化生成授权密钥的功能,利用RC6算法实现文件的加密和解密功能。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.