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For the Counter mode, suppose a message is divided into five message blocks. (1) If the nonce part of the counter is modified during transit,

For the Counter mode, suppose a message is divided into five message blocks. (1) If the nonce part of the counter is modified during transit, which blocks can the receiver correctly decrypt and which not? (2) If the third ciphertext block is modified during transit, which blocks can the receiver correctly decrypt and which not?

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