Description: 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
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