-
poly
A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution ciphers are useful because the are less easily broken by frequency analysis, however if an attacker knows for instance that the message has a period n, then he simply can individually frequency analyze each cipher alphabet.
The number of letters encrypted before a polyalphabetic substitution cipher returns to its first cipher alphabet is called its period. The larger the period, the stronger the cipher. Of course, this method of encryption is certainly not secure by any definition and should not be applied to any real-life scenarios.
- 2015-02-27 14:52:28下载
- 积分：1
-
fd
说明： 风力发电中的最小模型，从风机，到电池存储一个完整的模型，最终输出直流电压，可经过逆变模块并网。(Wind power in the smallest model, the fans, to the battery to store a complete model, the final output DC voltage, through the inverter module and network.)
- 2015-03-24 11:37:58下载
- 积分：1
-
Armada_v_1_4
Association Rule Mining and Deduction Analysis 1.1.4
- 2015-03-29 05:25:59下载
- 积分：1
-
5
说明： Wireless Sensor Networks WSNs Modified LEACH
- 2015-04-13 20:09:25下载
- 积分：1
-
matlab
MATLAB编程经典程序 素数的判断，求0～100素数之和 源程序(The MATLAB programming classic program primes judgment, seeking 0 to 100 primes and source)
- 2013-02-28 12:29:12下载
- 积分：1
-
Windows
用MATLAB设计各种滤波器参数，包括各种窗函数法，如凯撒、汉明、布莱克特等(MATLAB filter design using a variety of parameters, including a variety of window function, such as Kaiser, Hamming, Blackett, etc.)
- 2008-07-31 14:24:29下载
- 积分：1
-
sanxiangspwm
三相电压型spwm逆变器仿真 IGBT模型已修改 电流跟踪型逆变器仿真(three v spwm inventor)
- 2020-12-05 20:29:23下载
- 积分：1
-
wjpjvchd
包括主成分分析、因子分析、贝叶斯分析，计算多重分形非趋势波动分析，D-S证据理论数据融合，MIMO OFDM matlab仿真,应用小区域方差对比，程序简单，基于SVPWM的三电平逆变的matlab仿真。( Including principal component analysis, factor analysis, Bayesian analysis, Calculate the multifractal trend fluctuation analysis, D-S evidence theory data fusion, MIMO OFDM matlab simulation, Application of small area variance comparison, simple procedures, Based on SVPWM three-level inverter matlab simulation.)
- 2016-04-05 23:52:39下载
- 积分：1
-
ofdm
OFDM正交频分复用程序...对于初学者很有帮助
(OFDM Orthogonal Frequency Division Multiplexing procedures for beginners helpful ...)
- 2007-07-03 00:13:38下载
- 积分：1
-
IEEE_33bus2
IEEE 33-bus with pq loads in psat format using simulink
- 2014-06-26 20:35:18下载
- 积分：1
