Let A = {A, B, C, . . . , X, Y, Z, +, *, $, @} and t = 4. Choose e = (P1, P2, P3, P4) where P1 maps each letter to the letter three positions to its right in the alphabet, P2 to the five positions to its right, P3 seven positions, andP4 ten-positions to its right. If message (m) = "THISCIPHERISCERTAINLYNOTSECURE" Find out the cipher-text *

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Stepbystep explanation In polyalphabetic substitution cipher the encryption of the block of the prov... View the full answer