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What is the main advantage of a mac

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Reference no: EM133214178

What is the main advantage of a MAC, compared to a message hash or a checksum?

Select one alternative:

  •  The MAC cannot be computed without the MAC key, so it cannot be updated by an attacker who changes the message content.
  •  The MAC can be added at an application level, while checksums are only useful at the TCP (packet) level.
  •  Most MAC algorithms support some form of precomputation, which increases efficiency.

Briefly explain the answer.

Reference no: EM133214178

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