6. A. In a fistel password structure with an n-bit block, the number of reversible maps for the ideal block password is! N2. Why? 

B. If all possible mappings are allowed to be selected for the ideal block password, it is a bit. But as mentioned in A, the number of maps is 2 × n n The length of the key according to Feistel n is possible! 2. So the length of the key is usually! Nlog2 based on 2, which is n! 

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Answer 6 A Answees fistel password structure nbit block No of reversible ma... View the full answer