Engineering, 06.03.2020 23:54 webbjalia04
Suppose a random cryptosystem is obtained as follows. The message consists of two independent random variables X, Y both generated by spinning a wheel with arcs labeled 0 and 1, both of lengthes 1/2. Let there be four equiprobalbe keys with the following corresponding encrypting transformations:
K1: (X1, X2) --- > (X1, X2) k2: (X1, X2) --- > (X2, X1) k3: (X1, X2) --- > (X1, (X1+X2) mod 2) k4: (X1, X2) --- > ((X1+X2) mod 2, X1)
Calculate the entropy of the cyphertext.
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Suppose a random cryptosystem is obtained as follows. The message consists of two independent random...
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