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AVALANCHE EFFECT IN THE FAMILY OF BLOCK CIPHERS “SD-(n,k)” - page 12 / 29

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Avalanche effect in encryption

Block size of 80 bits

Subtract-with-borrow random number generator with period 21492

Examination for each k={1,2,3,4,5,6,7,8,9,10} and for each subfamilies “SD4-(40,k)”, “SD16-(20,k)” and “SD256-(10,k)”

For every k, we use 1000 different random generated pairs of plaintext and keys

We compute mean and standard deviation of bit differences in ciphertext

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