Two-Track MAC (Message Authentication Code) is a cryptographic concept that involves the use of two separate tracks or mechanisms to ensure the integrity and authenticity of a message. In general, a MAC is a short piece of information that is used to authenticate a message, ensuring that both the message came from a legitimate sender and that it hasn't been altered in transit. The "Two-Track" aspect typically refers to the parallel use of two different methods or keys to generate the MAC.
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