A disadvantage of the general monoalphabetic cipher is that both sender and receiver must commit the permuted cipher sequence to memory.A common technique for avoiding this is to use a keyword from which the cipher sequence can be generated. For example,using the keyword CIPHER,write out the keyword followed by unused letters in normal order and match this against the plaintext letters: plain: a b c d e f g h i j k l m n o p q r s t u v w x y z cipher: C I P H E R A B D F G J K L M N O Q S T U V W X Y Z If it is felt that this process does not produce sufficient mixing,write the remaining