Re: [quicwg/base-drafts] loss of only two packets can lead to an unrecoverable situation (#2267)

Martin Thomson <> Thu, 31 January 2019 02:24 UTC

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From: Martin Thomson <>
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Subject: Re: [quicwg/base-drafts] loss of only two packets can lead to an unrecoverable situation (#2267)
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Tokyo conclusion: we will explore the addition of the proposal @nibanks had in  This will allow us to address the multiple key update issue, and make the implicit acknowledgment mess transitioning from Initial to Handshake (i.e., #1951) together with the one solution.

Tentatively, the signal we're looking for is a frame that says "I have emplaced read and write keys for epoch N".  Once a peer has both sent and received this frame, then they can discard keys for earlier epochs (and indeed SHOULD for Initial).

We might also use this as a signal to drive the solution to #2309.

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