1. The following hash functions are built from a block cipher E() draw a block diagram for each function [10 Marks]:
   1. EHi-1,xixi
   2. EHi-1,xiHi-1xiHi-1
   3. EHi-1,xixiHi-1
   4. ExiHi-1,xiHi-1
   5. ExiHi-1,Hi-1Hi-1

b) The following hash functions are built from a block cipher E() draw a block diagram for each function (10 Marks]: 1) E(Hi-1,x;) Xi 2) E(H-1,3 9 H-1) 2 x 8 H-1 3) E(Hi-1, xi) xi Hi-1 4) E(x 9 H-1,16) H-1 5) F(x, 9 H-1, H,-1) 9 H1