Affine Cipher Decryption - Search Videos

Affine Cipher - Decryption (Known Plaintext Attack)

YouTubeTheoretically

Affine Cipher - Decryption (Known Plaintext Attack)

In this video I talk about ways to decrypt the Affine Cipher when the key is NOT known. Specifically, I go over an example of the known plaintext attack. 3^(-1) = 9 (mod 26) math worked out (Euclidean Algorithm): 1. Forwards: 26 = 3(8) + 2 3 = 2(1) + 1 2. Backwords: 1 = 3 - 2(1) 1 = 3(1) - (26 - 3(8))(1) 1 = 3(1) - 26 + 3(8) 1 + 26 = 3(9) 1 ...

65.5K viewsMar 18, 2015

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