Question: 5. (20 pts) Is the Tiny Encryption Algorithm, TEA, a Feistel Cipher? Some people say TEA is almost a Feistel Cipher. Do you agree with

5. (20 pts) Is the Tiny Encryption Algorithm, TEA, a Feistel

5. (20 pts) Is the Tiny Encryption Algorithm, TEA, a Feistel Cipher? Some people say TEA is "almost" a Feistel Cipher. Do you agree with that? Why? 6. (20 pts) Suppose that we use a block cipher to encrypt according to the rule C0=IVE(P0,K),C1=C0E(P1,K),C2=C1E(P2,K), (1) What is the corresponding decryption rule? (2) Is this a safe way of using block cipher? Why

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