## The following is a quotation encrypted using substitution.

Find the substitution key, and decrypt the encrypted quotation. In addition to the

decrypted plain text, you must also show how you found the key. gahzh zgafi‘ irfcc fqgmx eefip

xmgab brscygadgb afqbf dsfih rvhqm xsgnq fxmgf qgafz nsmfh gxmxn squkfaduh xnsbfjdvfi

nhcgp xmxns yhzdz gfszg afinq gafjx quqy gafig dszdz hmbfb fsfuh ccdhq zkqu rfizh gpmxx

czkpa fdufq cprxj enczh xq 2-Using S-DES, decrypt the string (10100010) using the key (01 1 1 1 1 1 101)

by hand. Show the intermediate results after each function (IP. FK SW. FK lP-1); then decode the

first 4 bits of the plaintext string to a letter. and the second 4 bits to another letter where we encode

A through P in base 2 (Le, A = 0000. B = 0001, P = 1111). Are you able to help me solve these 2

questions?