RSA ( Rivest Shamir Adleman )is crypthograph system that used to give a secret information and digital signature . Its security based on Integer Factorization Problem (IFP). RSA uses an asymetric key. RSA was created by Rivest, Shamir, and Adleman in 1977. Every user have a pair of key, public key and private key. Public key (e) . You may choose any number for e with these requirements, 1< e <Æ (n), where Æ (n)= (p-1) (q-1) ( p and q are first-rate), gcd (e,Æ (n))=1 (gcd= greatest common divisor). Private key (d). d=(1/e) mod(Æ (n)) Encyption (C) . C=Mª mod(n), a = e (public key), n=pq Descryption (D) . D=C° mod(n), o = d (private key
标签： crypthograph information Adleman Rivest
上传时间： 2017-09-01
上传用户：chfanjiang
The many variants of the Unix operating system require use of a mode of thought that s significantly different from the one that s required by simpler operating systems. Think Unix introduces readers to important fundamental and intermediate Unix commands and, in the process, inculcates them in the Unix way of thinking. It s a worthy goal in a world with more Linux users than ever, and author Jon Lasser accomplishes it. He s both a capable writer and a knowledgeable user of Unix shell commands. Lasser uses bash under Red Hat Linux in most examples--which usually apply equally well to other Unix variants--and makes asides about other shells and environments, as needed.
标签： significantly operating variants of
上传时间： 2017-09-04
上传用户：qq521
在项目中的数据库层中的数据库访问类都从DatabaseObject类派生，这样只需要在一个地方设置数据连接，其他地方都不需要涉及数据库访问的具体连接代码。 如：User类专门负责Users组的权限控制等，只需要简单的代码就可以连接并访问数据库了。这里具体实 现与此文章无关，只举一两个模块做例子。
标签： DatabaseObject 数据库 项目 访问
上传时间： 2013-12-28
上传用户：小儒尼尼奥
Aodv for NS-2. A mobile ad-hoc network (MANET) is a kind of wireless ad-hoc network, and is a self-configuring network of mobile routers connected wirelessly. MANET may operate in a standalone fashion, or may be connected to the larger Internet. Many routing protocols have been developed for MANETs over the past few years. This project evaluated three specific MANET routing protocols which are Ad-hoc On-demand Distance Vector (AODV), Dynamic Source Routing (DSR) and Dynamic MANET Ondemand routing protocol (DYMO) to better understand the major characteristics of these routing protocols. Different performance aspects were investigated in this project including packet delivery ratio, routing overhead, throughput and average end-to-end delay.
标签： network ad-hoc wireless mobile
上传时间： 2014-01-12
上传用户：zsjzc
Genode FX is a composition of hardware and software components that enable the creation of fully fledged graphical user interfaces as system-on-chip solutions using commodity FPGAs.
标签： composition components hardware creation
上传时间： 2017-09-24
上传用户：huql11633
实验目的：用c语言对一个简单语言的子集编制一个一遍扫描的编译程序，以加深对编译原理的理解,掌握编译程序的实现方法和技术。 c.1词法分析 c.1.1实验目的 设计、编制并调试一个词法分析程序，加深对词法分析原理的理解。 c.1.2实验要求 c.1.2.1待分析的简单语言的词法 (1) 关键字： begin if then while do end --------有实验报告+.cpp+分析
上传时间： 2013-12-23
上传用户：z754970244
语法分析 C2.1 实验目的 编制一个递归下降分析程序,实现对词法分析程序所提供的单词序列的语法检查和结构分析. C2.2 实验要求 利用C语言编制递归下降分析程序,并对简单语言进行语法分析. C2.2.1待分析的简单语言的语法 用扩充的BNF表示如下: (1)<程序>：：＝begin<语句串>end (2)<语句串>：：＝<语句>{ <语句>} (3)<语句>：：＝<赋值语句> (4)<赋值语句>：：＝ID：＝<表达式> (5)<表达式>：：＝<项>｛＋<项> | —项>｝ (6)<项>：：＝<因子>{*<因子> | /<因子>} (7)<因子>：：＝ID | NUM | (<表达式>) Ｃ２。２。２实验要求说明 输入单词串，以“＃”结束，如果是文法正确的句子，则输出成功信息，打印“success”,否则输出“error”.
上传时间： 2014-09-05
上传用户：caiiicc
实验目的 通过上机实习,加深对语法制导翻译原理的理解,掌握将语法分析所识别的语法成分变换为中间代码的语义翻译方法. 实验要求 采用递归下降语法制导翻译法,对算术表达式、赋值语句进行语义分析并生成四元式序列。 实验的输入和输出 输入是语法分析提供的正确的单词串，输出为三地址指令形式的四元式序列。 例如：对于语句串 begin a:=2+3*4 x:=(a+b)/c end# 输出的三地址指令如下： （1） t1=3*4 （2） t2=2+t1 （3） a=t2 （4） t3=a+b （5） t4=t3/c （6） x=t4
上传时间： 2017-09-27
上传用户：hjshhyy
A MATLAB program has been written to investigate Orthogonal Frequency Division Multiplexing (OFDM) communication systems. This program is valuable for future researchers simulating systems that are too theoretically complex to analyze. Single-carrier QAM and multicarrier OFDM are compared to demonstrate the strength of OFDM in multipath channels. Two graphical user interface demonstrations show some of the basic concepts of OFDM.
标签： Multiplexing investigate Orthogonal Frequency
上传时间： 2013-12-09
上传用户：redmoons
Among the many features built into Microchip’sEnhanced FLASH Microcontroller devices is the capability of the program memory to self-program. This very useful feature has been deliberately included to give the user the ability to perform bootloading operations.Devices like the PIC18F452 are designed with a designated“boot block”, a small section of protectable program memory allocated specifically for bootload firmware.
上传时间： 2015-03-05
上传用户：rfvrfv
