core-wg / oscore-groupcomm

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Clarify key id in which messages #14

Closed fpalombini closed 4 years ago

fpalombini commented 5 years ago

by @jimsch:

In working through all of the roll over cases I am dealing with, I have a question. The key identifier is a required field in all response messages. Is the group identifier a required field in all response messages or is it only required under certain circumstances? The circumstances would be if the key context is not the same as the (original?) request. Not too sure what the answer is going to be if you are looking at a sequence of observe responses where you would really like to stop sending the group identifier if it is not needed any more.