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,X; H-1) X; H-1 3) E(H-1,x) xi Hi-1 4) F(x 4 H-1,x) 9 H-1 5) E(xi Hi-1,Hi-1) H-1