Using TR-31 key exchange, how is it possible to use restrictive modes of use, such as V (Verify only)? If Alice were to generate such a key, and send it to Bob, Bob would not be able to generate a MAC for Alice to verify. Can this be solved without leaving the safe bounds of Key Blocks? To be specific, I am referring to ASC X9 TR 31-2018, Interoperable Secure Key Exchange Key Block Specification.



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