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A substitution cipher of any English text is simply a permutation of the alphabet a,b,c,., z. Consider the following substitution key a b c d
A substitution cipher of any English text is simply a permutation of the alphabet a,b,c,., z.
Consider the following substitution key
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
A S T I C H N ME V B D F G J K L O P Q R U W X Y Z
(a) Write the inverse key
(b) Find the cycle decomposition of the given key
(c) What is the order of the given substitution key
(d) Decrypt the following message
QMCMEPQJOYJHQMCGAQEJGADPCTROEQYEPPMOJRICIEGPCTOCTY
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