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Inverse of Initial Permutation is nothing but saying the index of an element in array, this is the last step in DES while generating cipher text

now for IP= 45613702

Create a new array arr

arr[0]=>index of 0 in IP=>6

arr[1]=>index of 1 in IP=>3

similarly if we proceed  we get Option D.

 

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is DES IN THE SYLLABUS
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i dont think so ..its in 2019 syllybus

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