Method Crypto.Substitution()->set_ACA_K4_key()

Method set_ACA_K4_key

this_program set_ACA_K4_key(string key1, string key2, void|int offset, void|array(string) alphabet)

Description

Sets the key according to ACA K4 key generation. Both the plaintext and the cryptogram alphabets are prepended with the keywords key1 and key2. The plaintext alphabet is then rotated offset number of steps.