>It seems very likely that even just one single message of the NTS KE
>will require sending multiple packets to the server.  This needs to
>be dealt with somehow.  
>
>As such, I'm not convinced that sending these KE messages according
>to the NTP polling interval makes sense.  I'm further concerned
>because I don't understand how the NTS KE will deal with lost
>packets.

We will add a paragraph treating the topic of lost packets.

Our intended approach is to just have the client go into a waiting state for each of its still unanswered requests. 
This waiting state would either be ended successfully by a verifiable reply (what verifiable means depends on the context), or unsuccessfully by reaching a timeout value (which would be configurable in its length, but whose existence would be mandatory). In the latter case, either a re-transmission of the last message or a restart of the protocol would occur, depending on context

Does anyone here have criticism or other suggestions on this topic?

Kristof
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