Playfair Cipher
1.not even the large number of keys in a monoalphabetic cipher provides security
2.one approach to improving security was to encrypt multiple letters
3.the Playfair Cipher is an example
4.invented by Charles Wheatstone in 1854,but named after his friend Baron Playfair
Playfair Key M ...
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标签：
monoalphabetic
Playfair
provides
security
上传时间：
2017-05-25
上传用户：变形金刚
