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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
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tma_ekf20100512
卡尔曼滤波算法和扩展卡尔曼滤波算法在目标跟踪到的应用(Kalman filter and extended Kalman filter algorithm to the application in target tracking)
- 2011-05-21 18:45:44下载
- 积分：1
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GUNESHUCRE
photovoltaic matlab model two diode solar energy
- 2013-04-02 03:55:42下载
- 积分：1
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MediaRecorderStateUnitTestTemplate
A template class for running a method under test in all possible states of a MediaRecorder object.
- 2013-12-06 14:36:59下载
- 积分：1
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huidutuzhuanhuaweiweicaisetu
本代码，用MATLAB编写。把灰度图转化为伪彩色图。(The code, prepared by using MATLAB. The grayscale into a pseudo-color map.)
- 2009-04-27 23:29:52下载
- 积分：1
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WiMAX_matlab
Wimax physical layer simulation using mandatory channel coding.
- 2013-02-25 14:21:00下载
- 积分：1
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arrow
画箭头用的一个matlab程序，最新更新版(A matlab program for drawing arrowheads, the latest update)
- 2017-12-12 22:15:03下载
- 积分：1
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Hseries_7Level_Inverter_No1
说明： 七电平逆变器的Simulink模型，调制方式采用SPWM方式，拓扑为H桥级联。(The Simulink model of Seven-level inverters adopts SPWM modulation mode and H-bridge cascade topology.)
- 2021-04-19 21:58:50下载
- 积分：1
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eye_detect
用matlab语言来实现一幅图像中对人脸中左右眼睛的定位。(detect eye in a image which include a face)
- 2014-11-14 10:09:04下载
- 积分：1
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chuojuwajujishusuanfamatlab
数据挖掘部分算法的matlab实现 C4_5
大家可以共同研究研究(Data mining algorithm matlab part we will be able to realize C4_5 Research)
- 2008-03-01 13:39:37下载
- 积分：1
