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Enciphering scheme: Design a product cipher based on the Feistel structure that combines three
classical transposition and substitution ciphers. Give the specifications of your product cipher
both using a diagram and a formal notation. The answer should cover how keys are generated
and used.

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  • 1. Enciphering scheme: Design a product cipher based on the Feistel structure that combines three classical transposition and substitution ciphers. Give the specifications of your product cipher both using a diagram and a formal notation. The answer should cover how keys are generated and used.