Is it feasible to tamper with a MAC (message authentication code) and change the Tag and ciphertext while they are in transit? If you want to understand why this attack fails, consider the fact that the recipient can always tell when the Tag or ciphertext has been altered.

Is it feasible to tamper with a MAC (message authentication code) and change the Tag and ciphertext while they are in transit? If you want to understand why this attack fails, consider the fact that the recipient can always tell when the Tag or ciphertext has been altered.

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