对称密码体制的发展趋势将以分组密码为重点。分组密码算法通常由密钥扩展算法和加密（解密）算法两部分组成。密钥扩展算法将b字节用户主密钥扩展成r个子密钥。加密算法由一个密码学上的弱函数f与r个子密钥迭代r次组成。混乱和密钥扩散是分组密码算法设计的基本原则。抵御已知明文的差分和线性攻击，可变长密钥和分组是该体制的设计要点。
上传时间： 2013-12-14
上传用户：shanml
To use the ATLTrace tool: Debug an MFC or ATL project select Start from the Debug menu. Select MFC/ATL Trace Tool in the Tools menu. Expand the tree control list in the Trace List window. Here you will see the running application, any modules within that application, and the trace categories for each module. Customize, for each process, module, and category, which information is displayed in the output window. The Trace level control in the Process group is related to the ATLTRACE2 level only those ATLTRACE2 messages with a level equal to or greater than the setting in the Trace level control will be displayed in the output window. Select Apply to put your settings into effect. You can save your settings, and load them the next time you debug the application use the Save and Load buttons.
标签： Debug the ATLTrace project
上传时间： 2014-01-15
上传用户：wfl_yy
use a simply manner to transfer little lendian ASCII number to hexcdemical, and vice versa.
标签： hexcdemical transfer lendian simply
上传时间： 2013-12-12
上传用户：gonuiln
how you can use Silverlight to supplement ASP.NET websites
标签： Silverlight supplement websites how
上传时间： 2016-03-26
上传用户：whenfly
基于MSP430单片机TimerB的数字->模拟信号转换的设计.利用MSP430定时器B产生PWM,然后再通过RC滤波,得到直流或交流电压信号.此方法成本低廉,可靠性高,易于使用.
上传时间： 2013-11-26
上传用户：lanjisu111
you can use this matlab code to change image into different color system such as luv, rgb, yuv and lab
标签： different matlab change system
上传时间： 2016-03-27
上传用户：小眼睛LSL
you can use this C++ code to fabricate MFC program
标签： fabricate program this code
上传时间： 2014-02-11
上传用户：ardager
c语言编写的B+树，可实现树的构造和记录查找。
上传时间： 2016-03-27
上传用户：朗朗乾坤
1.c企业发放的奖金根据利润提成。 2.c 计算器 3.c 班级通信录 4.c 求x的y方的低三位值 5.c a b 两数组分别正逆序相加
上传时间： 2014-08-24
上传用户：天涯
this C file provides a method to use the timer in upsd mirvo processor
标签： processor provides method mirvo
上传时间： 2016-03-28
上传用户：fnhhs
