Re: [quicwg/base-drafts] introduce a version alias mechanism (#2573)

"Philipp S. Tiesel" <> Mon, 01 April 2019 10:20 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 4E7431200E5 for <>; Mon, 1 Apr 2019 03:20:31 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -3
X-Spam-Status: No, score=-3 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, HTML_IMAGE_ONLY_32=0.001, HTML_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Authentication-Results: (amavisd-new); dkim=pass (1024-bit key)
Received: from ([]) by localhost ( []) (amavisd-new, port 10024) with ESMTP id yIYJVNVeIuuc for <>; Mon, 1 Apr 2019 03:20:29 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 4D4A31200E3 for <>; Mon, 1 Apr 2019 03:20:29 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed/relaxed;; h=from:reply-to:to:cc:in-reply-to:references:subject:mime-version:content-type:content-transfer-encoding:list-id:list-archive:list-post:list-unsubscribe; s=s20150108; bh=lMQevf89WO7MF3k7uUmCDgPHe0M=; b=Euq+Cf95eu9Vi40A Ct8xiCHYp0BoOsk7ELR7B9IZAnR4Vg5YH0lHgyoqhwSs7Huh7g8oFR+kDhxd5UKX QoGkgPFDMQFj0ewuNad2npWpoTOdi5CCeUMSOpXXZiti9G9ou4spToEkR445LRjV nXwScabhbfEJIpM2tqEaqxKaKto=
Received: by with SMTP id filter1474p1mdw1-32313-5CA1E5EC-17 2019-04-01 10:20:28.263980104 +0000 UTC m=+233104.335685375
Received: from (unknown []) by (SG) with ESMTP id LQV0-jE_S4mGlgXDqiCJzw for <>; Mon, 01 Apr 2019 10:20:28.201 +0000 (UTC)
Received: from (localhost []) by (Postfix) with ESMTP id 2ECFC3E09F3 for <>; Mon, 1 Apr 2019 03:20:28 -0700 (PDT)
Date: Mon, 01 Apr 2019 10:20:28 +0000
From: "Philipp S. Tiesel" <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/pull/2573/review/>
In-Reply-To: <quicwg/base-drafts/pull/>
References: <quicwg/base-drafts/pull/>
Subject: Re: [quicwg/base-drafts] introduce a version alias mechanism (#2573)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5ca1e5ec2d293_79953fb0466d45bc1159b0"; charset="UTF-8"
Content-Transfer-Encoding: 7bit
Precedence: list
X-GitHub-Sender: philsbln
X-GitHub-Recipient: quic-issues
X-GitHub-Reason: subscribed
X-Auto-Response-Suppress: All
X-SG-EID: l64QuQ2uJCcEyUykJbxN122A6QRmEpucztpreh3Pak1fd4POrTkWY2cfHbHRoM3VJ4nhvOclOJYXh/ ZVwZ7holDb1C7zxi1UcudHMSvmzgm2UGRAj+65CYYEkdd6l86dJ2UJaO+H5EA3B0diZVGbgH3D9xVO zQ+JMFLsp2o1RwNTKkNMNyT9BYzr5nQ3XYvVdJjdrkIw2IKAq04VQooRFaw+kIu9cBtVaxkT6lXp/U Q=
Archived-At: <>
X-Mailman-Version: 2.1.29
List-Id: Notification list for GitHub issues related to the QUIC WG <>
List-Unsubscribe: <>, <>
List-Archive: <>
List-Post: <>
List-Help: <>
List-Subscribe: <>, <>
X-List-Received-Date: Mon, 01 Apr 2019 10:20:32 -0000

philsbln commented on this pull request.

> @@ -3246,7 +3246,21 @@ Implementors are encouraged to register version numbers of QUIC that they are
 using for private experimentation on the GitHub wiki at
+## Version Aliases
+In order to avoid ossification of the version number defined by this draft,
+servers announce a list of version numbers that they interpret as an alias for
+the version number used in this draft. Alias versions MUST NOT be a reserved
+version. Servers SHOULD send at least one version alias, and SHOULD frequently
+change the value that they announce. Each version alias contains a lifetime,
+which indicates how long the server will accept this version alias. It also
+contains an initial salt, which is used instead of the initial salt as defined

Even without the salt, the presence of multiple QUIC versions with different salts would force a middle-box to opportunistically decrypt initials using different salts. So if we decide QUIC being blocked because of too much obfuscation is a consideration, this proposal adds to this level even without a salt.

You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub: