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AVALANCHE EFFECT IN THE FAMILY OF BLOCK CIPHERS “SD-(n,k)” - page 13 / 29

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Avalanche effect in encryption

Results for “SD4-(40, k)”:

Flipping one bit in plaintext cause already for k=2 50% different bits in ciphertext

Standard deviation is stabilized around 5,6 for k=3

Flipping one bit in key cause dropping of different bits in ciphertext from 50,57% for k=1 to 50,16% for k=10

Standard deviation drops from 6,31 for k=2 to 5,88 for k=10

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