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1) What is the difference between diffusion and confusion? Give example, using the operations in DES. 2) Use AES as an example, to illustrate the

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1) What is the difference between diffusion and confusion? Give example, using the operations in DES. 2) Use AES as an example, to illustrate the difference between a block cipher and a stream cipher. 3) Please introduce the structure with illustration of the Feistel cipher

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