Re: [quicwg/base-drafts] Migration with zero-length CID is inadvisable (#3563)

ianswett <> Tue, 31 March 2020 23:49 UTC

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Date: Tue, 31 Mar 2020 16:48:57 -0700
From: ianswett <>
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Subject: Re: [quicwg/base-drafts] Migration with zero-length CID is inadvisable (#3563)
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@ianswett commented on this pull request.

> @@ -2246,6 +2246,13 @@ that packet numbers cannot be used to correlate activity.  This does not prevent
 other properties of packets, such as timing and size, from being used to
 correlate activity.
+An endpoint SHOULD NOT initiate migration when a peer that requests the use of
+a zero-length connection ID. If the peer routes incoming packets using the
+source address, migration might not be successful. If the peer routes incoming
+packets by assigning a unique destination address to the connection, which
+might be achieved using using the preferred_address transport parameter (see
+{{preferred-address}}), packets sent on different paths will be linkable.

{{preferred-address}}), packets sent on different paths are likely to be linkable.

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