Folks who use AEAD cryptography in their applications: are there protocols or situations where you don't know any additional data to authenticate when you know the plaintext to encrypt?
But to authenticate the message, the receiver will need to know what the timestamp actually is :)
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We clearly don't understand each other. :) Do you mean that there's absolutely no authenticated data in the message sent?
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I thought you're asking about situation there auth. data is present eventually, but is unknown at the moment of encryption.
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