Cryptoanalysis Example . We know that a simple substitution is used But not necessarily a shift by n Find the key given the ciphertext: PBFPVYFBQXZTYFPBFEQJHDXXQVAPTPQJKTOYQWIPBVWL XTOXBTFXOWAXBVCXOWAXFOJVWLEONTOZOGGOLFXOW AKVWLXOWAEBIPBFXFOVXGTVJVWLBTPOWAEBFPBFHCVL XBQUFEVWLXGDPEOVPOGVPPBFTIXPFHXZHVFAGFOTHFEF BQUFTDHZBQPOTHXTYFTODXQHFTDPTOGHFQPBQWAQJJT ODXQHFOQPWTBDHHIXQVAPBFZQHCFWPFHPBFIPBQWKFA BVYYDZBOTHPBOPOJTQOTOGHFOAPBFEQJHDXXQVAVXEB PEFZBVFOJIWFFACFCCFHOWAUVWFLOHGFXVAFXQHFUF HILTTAVWAFFAWTEVOITDHFHFQAITIXPFHXAFQHEFZQWGF VWPTOFFA CS320/Computer Data Security&Privacy Sunday, February 25, 2018