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A Hill cipher with key K = [3 3; 2 5] (mod 26) encrypts 2-letter blocks as C = K·P(column vector P). The plaintext HELP encrypts to
with key K = [3 3; 2 5] (mod 26) encrypts 2-letter blocks as C = K·P
(column vector P). The plaintext
HIAT
DPLE
IHTA
HITA
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