The expansion function E() of the DES algorithm is as follows:

32, 1, 2, 3, 4, 5
 4, 5, 6, 7, 8, 9
 8, 9,10,11,12,13
12,13,14,15,16,17
16,17,18,19,20,21
20,21,22,23,24,25
24,25,26,27,28,29
28,29,30,31,32, 1

Return to CS431 homework assignment #3