RSA算法是第一个能同时用于加密和数字签名的算法，也易于理解和操作。RSA是被研究得最广泛的公钥算法，从提出到现在已近二十年，经历了各种攻击的考验，逐渐为人们接受，普遍认为是目前最优秀的公钥方案之一。RSA的安全性依赖于大数的因子分解，但并没有从理论上证明破译RSA的难度与大数分解难度等价。即RSA的重大缺陷是无法从理论上把握它的保密性能如何，而且密码学界多数人士倾向于因子分解不是NPC问题。 RSA的缺点主要有：A)产生密钥很麻烦，受到素数产生技术的限制，因而难以做到一次一密。B)分组长度太大，为保证安全性，n 至少也要 600 bits 以上，使运算代价很高，尤其是速度较慢，较对称密码算法慢几个数量级；且随着大数分解技术的发展，这个长度还在增加，不利于数据格式的标准化。目前，SET( Secure Electronic Transaction )协议中要求CA采用比特长的密钥，其他实体使用比特的密钥
上传时间： 2014-10-13
上传用户：sz_hjbf
是一本介绍java基础应用的好书 Java For Artists targets both the undergraduate computer science or information technology student and the practicing programmer. It is both an introductory-level textbook and trade book. As a textbook it employs learning objectives, skill-building exercises, suggested projects, and self-test questions to reinforce the learning experience. The projects offered range from the easy to the extremely challenging. It covers all the topics you’d expect to find in an introductory Java programming textbook and then some. As a trade book it goes purposefully deeper into topics cut short or avoided completely in most introductory textbooks. Its coverage of advanced GUI programming techniques, network programming and object-oriented theory will enable you to take your skills to a higher level.
标签： undergraduate information computer Artists
上传时间： 2016-09-28
上传用户：qiaoyue
DevExpress.ExpressSideBar.v5.37.for.Delphi.BCB.Full.Source delphi和 bcb源码，能轻松实现outlook风格的侧边栏，效果很好，推荐！ ExpressSideBar is a VCL implementation of the MS Outlook bar. Designed to be easy to use and built with a significant feature set. Just drop it on a form, double click the control and in a few moments, you can customize the ExpressSideBar for your needs.
标签： ExpressSideBar DevExpress Delphi Source
上传时间： 2013-12-26
上传用户：han_zh
Writing Robust Java Code The AmbySoft Inc. Coding Standards for Java v17.01d Scott W. Ambler Software Process Mentor This Version: January 15, 2000 Copyright 1998-1999 AmbySoft Inc.Purpose of this White Paper This white paper describes a collection of standards, conventio code. They are based on sound, proven software engineering p understand, to maintain, and to enhance. Furthermore, by foll productivity as a Java developer should increase remarkably ¨C write high-quality code right from the start you will have a much development process. Finally, following a common set of codi making teams of developers significantly more productive.
标签： W. Java Standards AmbySoft
上传时间： 2013-12-22
上传用户：mhp0114
This GTK+ version 2.12.3. GTK+ is a multi-platform toolkit for creating graphical user interfaces. Offering a complete set of widgets, GTK+ is suitable for projects ranging from small one-off projects to complete application suites.
标签： multi-platform interfaces GTK graphical
上传时间： 2016-10-13
上传用户：ve3344
Tricks of the Windows Game Programmin Gurus, 2E takes the reader through Win32 programming, covering all the major components of DirectX including DirectDraw, DirectSound, DirectInput (including Force Feedback), and DirectMusic. Andre teaches the reader 2D graphics and rasterization techniques. Finally, Andre provides the most intense coverage of game algorithms, multithreaded programming, artificial intelligence (including fuzzy logic, neural nets, and genetic algorithms), and physics modeling you have ever seen in a game book.
标签： programming Programmin the covering
上传时间： 2014-01-02
上传用户：wangchong
Atheros Communications AR6001 WLAN Driver for SDIO installation Read Me March 26,2007 (based on k14 fw1.1) Windows CE Embedded CE 6.0 driver installation. 1. Unzip the installation file onto your system (called installation directory below) 2. Create an OS design or open an existing OS design in Platform Builder 6.0. a. The OS must support the SD bus driver and have an SD Host Controller driver (add these from Catalog Items). b. Run image size should be set to allow greater than 32MB. 3. a. From the Project menu select Add Existing Subproject... b. select AR6K_DRV.pbxml c. select open This should create a subproject within your OS Design project for the AR6K_DRV driver. 4. Build the solution.
标签： Communications installation Atheros Driver
上传时间： 2016-10-27
上传用户：hebmuljb
The code on this diskette has been organized by chapter. Each subdirectory containing listing has a readme.txt describing program usage and any relevent file formats. The readme will also describe how to compile the target programs under IBM OS/2 (TM) using the using C Set++ compiler (TM). All programs on this diskette have been compiled and tested in this environment. The majority of programs on this diskette should port to other environments with only minor adjustments. The exception to this are those programs which utilize presentation manager for graphical display of program data. In particular, the grid1 programs in \chapt4\backprop\ and \chapt3\ fall into this latter category.
标签： subdirectory containing has organized
上传时间： 2016-10-28
上传用户：冇尾飞铊
A few short years ago, the applications for video were somewhat confined—analog was used for broadcast and cable television, VCRs, set-top boxes, televisions and camcorders. Since then, there has been a tremendous and rapid conversion to digital video, mostly based on the MPEG-2 video compression standard. Today, in addition to the legacy DV, MPEG-1 and MPEG-2 audio and video com- pression standards, there are three new high- performance video compression standards. These new video codecs offer much higher video compression for a given level of video quality.
标签： applications for confined somewhat
上传时间： 2016-10-29
上传用户：bjgaofei
FMA is a free1 powerful phone editing tool allowing users to easily manage all of the personal data stored in their phones, via a number of different connections methods. FMA allows easy management of Phonebook (both SIM and Phone memory), SMS, Profiles, and Files stored on the phone. FMA can also allow you to pickup and dial calls directly from your PC. FMA is fun and much more whatever you want it to be, it is whatever a mobile phone should have :-) (Currently based on Sony Ericsson T610 features set).
标签： allowing powerful personal editing
上传时间： 2014-08-12
上传用户：wlcaption
