4SENDING SUPER-SECRET MESSAGES WITH A BOOK CIPHER
The Key to Rebecca is a critically acclaimed best-selling novel by Ken Follett. Set in Cairo in World War II and based on actual events, it tells the story of a Nazi spy and the British intelligence officer who pursued him. The title refers to the spy’s cipher system, which used the famous gothic novel Rebecca, written by Daphne du Maurier, as a key. Rebecca is considered one of the greatest novels of the 20th century, and the Germans really did use it as a code book during the war.
The Rebecca cipher is a variation of the one-time pad, an unbreakable encryption technique that requires a key that ...
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