Consider the block cipher in Figure 8.5. For a given “key” Alice and Bob would need to keep eight tables, each 8 bits by 8 bits. For Alice (or Bob) to store all eight tables, how many bits of storage are necessary? How does this number compare with the number of bits required for a full-table 64- bit block cipher?
(a) For Alice and Bob to store all eight tables how many bits of storage are necessary?
= 8*2^8*8
= (2^3)(2^8)(2^3)
= 2^14 bits
(b) How does this number compare with the number of bits required for a full-table 64-bit block cipher? (3 pts) (Referenced)