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HW1 - Show that a pseudorandom permutation P is not...

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Homework 1 (Due in Class, Feb 14 Thursday) 1. Design a good chaining mode. Describe your encryption and decryption algorithms in detail. 2. Consider CFB mode with n=64 and s=8. If a bit error occurs in the transmission of a ciphertext block, how far does the error propagate in the worst case? 3. (Extra credit. You are NOT required to do this question.)
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Unformatted text preview: Show that a pseudorandom permutation P is not predictable in the following sense: Given the values of P(1), P(2), …, P(10), no efficient algorithm can guess P(11) with probability > 1/(|D|-10)+0.001% when the seed length is sufficiently large....
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