This video shows how to decrypt the ciphertext when the key is known.
Decryption (unknown key): http://youtu.be/LaWp_Kq0cKs
Encryption: http://youtu.be/izFivfLjD5E
Vigenere Cipher – Decryption (Known Key)
テクノロジーThis video shows how to decrypt the ciphertext when the key is known.
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