Re: [quicwg/base-drafts] Discard Initial keys as soon as possible (#2045)

[janaiyengar <[e-mail]>]

janaiyengar commented on this pull request.



> @@ -3592,6 +3594,21 @@ and will contain a CRYPTO frame with an offset matching the size of the CRYPTO
 frame sent in the first Initial packet.  Cryptographic handshake messages
 subsequent to the first do not need to fit within a single UDP datagram.
 
+
+### Abandoning Initial Packets {#discard-initial}
+
+A client stops both sending and accepting Initial packets when it sends its
+first Handshake packet.  A server stops sending and accepting Initial packets
+when it receives its first Handshake packet.  Though packets might still be in
+flight or awaiting acknowledgment, no further Initial packets need to be
+exchanged beyond this point.  Initial packet protection keys are discarded (see
+Section 4.10 of {{QUIC-TLS}}) along with any loss recovery and congestion
+control state (see Sections 5.3.1.2 and 6.9 of {{QUIC-RECOVERY}}).

+1. @MikeBishop 's proposed text also explicitly articulates that this is an implicit acknowledgement, something that we've been shy to do before.

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