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A comment on The Cryptographic Doom Principle. Parent comment
https://tools.ietf.org/html/rfc4880#section-5.13
It also does digital signatures (but those are different than a MAC, they verify the identity of the sender).
The MAC takes a shared secret as input, so it should only reveal anything to parties that possess that secret.
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https://tools.ietf.org/html/rfc4880#section-5.13
It also does digital signatures (but those are different than a MAC, they verify the identity of the sender).
The MAC takes a shared secret as input, so it should only reveal anything to parties that possess that secret.