Question 3 One way to solve the key distribution problem is to use a line from a book that both the sender and the receiver possess. Consider the following ciphertext: B G L C J J Y Y N U D N T G T The key used to encrypt the original message is derived from the first letter of the first four words in the first sentence of The Hunt for the Red October, written by Tom Clancy. “Captain First Rank Marko Ramius of the Soviet Navy was dressed for the Arctic conditions normal to the Northen Fleet submarine base at Polyarnyy.” (Hint: The encoder has removed the blanks between the ciphertext. The key used here might not be a meaningful English word. However the plaintext is a meaningful English phrase). (a) Retrieve the key. (b) Retrieve the whole plaintext.
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Question 3 One way to solve the key distribution problem is to use a line from a book that both the sender and the receiver possess. Consider the following ciphertext: B G L C J J Y Y N U D N T G T The key used to encrypt the original message is derived from the first letter of the first four words in the first sentence of The Hunt for the Red October, written by Tom Clancy. “Captain First Rank Marko Ramius of the Soviet Navy was dressed for the Arctic conditions normal to the Northen Fleet submarine base at Polyarnyy.” (Hint: The encoder has removed the blanks between the ciphertext. The key used here might not be a meaningful English word. However the plaintext is a meaningful English phrase).
(a) Retrieve the key.
(b) Retrieve the whole plaintext.
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