Re: [quicwg/base-drafts] 0-RTT can't use transport parameters or 1-RTT frames (#2461)

Mike Bishop <> Thu, 14 February 2019 22:11 UTC

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From: Mike Bishop <>
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Subject: Re: [quicwg/base-drafts] 0-RTT can't use transport parameters or 1-RTT frames (#2461)
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(To be clear, @martinthomson pasted the URL again as the quote, and I expanded it to some of the relevant text.)  I think what he was meaning to point to was this:
> Though an endpoint might retain older keys, new data MUST be sent at the highest
currently-available encryption level.  Only ACK frames and retransmissions of
data in CRYPTO frames are sent at a previous encryption level.  These packets
MAY also include PADDING frames.

So the client is prohibited from doing that, but the server isn't currently obligated to check.  I've tried to create something along the lines you suggest in #2466 -- can you take a look?

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