Welcome![Sign In][Sign Up]
Location:
Search - smlr.m

Search list

[Crack Hack算法

Description: 维吉尼亚(Vigenere)密码为了提高密码的破译的难度,人们有发明一种多表置换的密码,即一个明文字母可以表示为多个密文字母,多表密码加密算法结果将使得对单表置换用的简单频率分析方法失效,其中维吉尼亚密码就是一种典型的加密方法。维吉尼亚密码是使用一个词组(语句)作为密钥,词组中每一个字母都作为移位替换密码密钥确定一个替换表,维吉尼亚密码循环的使用每一个替换表完成明文字母到密文字母的变换,最后所得到的密文字母序列即为加密得到的密文,具体过程如下: 设密钥 ,明文 , 加密变换 其中 例如,M=data security,k=best。可以先将M分解为长为4的序列data secu rity 每一节利用密钥k=best加密得密文c=Ek(M)=EELT TIUN SMLR。 当密钥k取的词组很长时,截获者就很难将密文破解。(我们还在计算机上就维吉尼亚密码设计的方法,编写了一个小的程序,可以运用其进行加密和相应的解密。见附录) 由于我们知识和条件所限,本学期对以上6种古典加密方法进行了学习和研究,从中我们收获颇多,我们了解古典密码学的基本原理和方法,并能够对信息进行简单的加密和解密,大大提高我们的学习文化知识的兴趣和热情,如果有条件我们在今后将进一步研究密码学。-Virginia (Vigenere) password to the password to raise the difficulty deciphering, people have invented a multi-table replacement passwords, or express a letter can be expressed as a number of secret alphabet, multi-table password encryption algorithm results will enable replacement of single table with a simple frequency analysis method failure, which Vij Caledonia is a typical password encryption methods. Virginia is the use of a password phrase (statement) as a key, every phrase has a letter as a replacement shift key password table to determine a replacement, Virginia passwords for each cycle of replacement of a complete table of explicit letters of the alphabet secret transform, get in the end secret alphabet sequence namely the encrypted ciphertext, the specific process is as follows
Platform: | Size: 1274 | Author: god | Hits:

[Crack Hack算法

Description: 维吉尼亚(Vigenere)密码为了提高密码的破译的难度,人们有发明一种多表置换的密码,即一个明文字母可以表示为多个密文字母,多表密码加密算法结果将使得对单表置换用的简单频率分析方法失效,其中维吉尼亚密码就是一种典型的加密方法。维吉尼亚密码是使用一个词组(语句)作为密钥,词组中每一个字母都作为移位替换密码密钥确定一个替换表,维吉尼亚密码循环的使用每一个替换表完成明文字母到密文字母的变换,最后所得到的密文字母序列即为加密得到的密文,具体过程如下: 设密钥 ,明文 , 加密变换 其中 例如,M=data security,k=best。可以先将M分解为长为4的序列data secu rity 每一节利用密钥k=best加密得密文c=Ek(M)=EELT TIUN SMLR。 当密钥k取的词组很长时,截获者就很难将密文破解。(我们还在计算机上就维吉尼亚密码设计的方法,编写了一个小的程序,可以运用其进行加密和相应的解密。见附录) 由于我们知识和条件所限,本学期对以上6种古典加密方法进行了学习和研究,从中我们收获颇多,我们了解古典密码学的基本原理和方法,并能够对信息进行简单的加密和解密,大大提高我们的学习文化知识的兴趣和热情,如果有条件我们在今后将进一步研究密码学。-Virginia (Vigenere) password to the password to raise the difficulty deciphering, people have invented a multi-table replacement passwords, or express a letter can be expressed as a number of secret alphabet, multi-table password encryption algorithm results will enable replacement of single table with a simple frequency analysis method failure, which Vij Caledonia is a typical password encryption methods. Virginia is the use of a password phrase (statement) as a key, every phrase has a letter as a replacement shift key password table to determine a replacement, Virginia passwords for each cycle of replacement of a complete table of explicit letters of the alphabet secret transform, get in the end secret alphabet sequence namely the encrypted ciphertext, the specific process is as follows
Platform: | Size: 1024 | Author: god | Hits:

[Othersmlr.m

Description: 编写的多元回归的交叉验证程序 可供做预测模型的同仁参考-Prepared by the multiple regression of cross-validation procedure
Platform: | Size: 1024 | Author: 娃娃 | Hits:

[Crack Hackvigenere

Description: 计一个vigenere密码类,类的对象各自拥有不用的密匙。用不用对象加密相同的明文,将会获得不同的密文。加密过程如下:设密匙为K=k1k2.......kn,明文为M=m1m2.......mn,密文为C=c1c2.......cn,其中k1k2.........kn,m1m2...........mn, c1c2.........cn,每个都代表一个字母。 将字母A到Z编号,从0到25,那么它们之间有这样的对应关系:ci=(mi+ki)mod26。 例如,M=data security,K=best,那么首先将M分解成长为4的序列:data secu rity 每一节都使用密匙K=best进行加密,得到序列:EELT TIUN SMLR 将明文的空格添加进去,就得到密文:EELT TIUNSMLR出于密码体制的需要,密文中的字母全部使用大写字母。-Account for one vigenere password class, class of objects do not have the keys of their respective owners. No object with the same plaintext encrypted, the ciphertext will be different. Encryption process is as follows: Let key as K = k1k2 ....... kn, expressly for the M = m1m2 ....... mn, the ciphertext is C = c1c2 ....... cn, where k1k2 ......... kn, m1m2 ........... mn, c1c2 ......... cn, each of which represents a letter. The letters A to Z number, from 0 to 25, then they have such a corresponding relationship between the: ci = (mi+ ki) mod26. For example, M = data security, K = best, then the first M sequence of decomposition of the growth of 4: data secu rity each section using the encryption key K = best, be sequences: EELT TIUN SMLR add the plaintext space go to get the ciphertext: EELT TIUNSMLR the need for cryptography, ciphertext letter in all uppercase letters.
Platform: | Size: 2048 | Author: 小杨 | Hits:

CodeBus www.codebus.net