SE 441 INFORMATION SYSTEMS SECURITY Early Ciphers.

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Presentation transcript:

SE 441 INFORMATION SYSTEMS SECURITY Early Ciphers

Early Ciphers: Atbash Plaintext: MALTEPE Ciphertext: NZOGVKV

Early Ciphers: Pigpen Plaintext: sadi evren seker Ciphertext:

Early Ciphers: Vigenere

 Plaintext: MALTEPE  Key: HUSEYIN  Ciphertext: TUDXCXR

Early Ciphers: Polybius m, 3th row and 2nd column –> 32 a, 1st row and 1st column –> 11 l, 3th row and 1st column –> 31 t, 4th row and 4th column –> 44 e, 1st row and 5th column –> 15 p, 3th row and 5th column –> 35 e, 1st row and 5th column –> 15 maltepe =