The goal of substitution is confusion; the encryption method is an attempt to make it difficult for a cryptanalyst or intruder to determine how a message and key were transformed into cipher text. A transposition is an encryption in which the letters of the message are rearranged. With transposition is, the cryptography aims for diffusion, widely spreading the information from the message or the key across the ciphertext. Transpositions try to break established patterns. Because a transposition is a rearrangement of the symbols of a message, it is also known as a permutation.
No comments:
Post a Comment