最近有个朋友问我关于维吉利亚密码如何用python实现加密,研究之后发现这是个挺好玩的东西,遂决定写篇博文记录一下. 一.何谓维吉利亚密码 第一列是密钥字母列,第一行是明文字母行.不难看出维吉利亚密码是基于凯撒加密进一步的延伸,使用了密钥的概念来对抗字频统计. 维吉尼亚密码引入了"密钥"的概念,即根据密钥来决定用哪一行的密表来进行替换,以此来对抗字频统计.假如以上面第一行代表明文字母,左面第一列代表密钥字母,对如下明文加密: TO BE OR NOT TO BE THAT IS THE
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Vigenere { public partial class Form1 : Form { private s
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Vigenere { public partial class Form1 : Form { , ]; priv
加密key='COMPUTER' plaintext='BLOCKCIPHERDESIGNPRINCIPLE' ascii='abcdefghijklmnopqrstuvwxyz'.upper() keylen=len(key) ptlen=len(plaintext) ciphertext = '' i = 0 while i < ptlen: j = i % keylen k = ascii.index(key[j]) m = ascii.index(plaintext[i]) cipher
在Python shell中输入import this就会在屏幕上打印出来Python的设计哲学,如下: In [25]: import this The Zen of Python, by Tim Peters Beautiful is better than ugly. Explicit is better than implicit. Simple is better than complex. Complex is better than complicated. Flat is bet