3.18 Using S-DES, decrypt the string (10100010) using the key (0111111101) by hand. Show intermediate results after each function (IP, Fk, SW, Fk, IP -1). Then decode the first 4 bits of the plaintext string to a letter and thesecond 4 bits to another letter where we encode A through P in base 2 (i.e., A = 0000, B = 0001,..., P =1111). Hint: As a midway check, after the application of SW, the string should be (00010011). Solution: OK | |
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