维吉尼亚算法_维吉尼亚加密算法_back_

The Guinness code is an encryption algorithm that uses a series of Caesar codes to form the alphabet of passwords. It is a simple form of multi table passwords.In order to make it clear we need to start with the shift replacement code which is the Caesar code.Caesar code is a kind of substitution encryption technology. All letters in plaintext are shifted back (or forward) according to a fixed number on the alphabet and then replaced with ciphertext.