Re: [quicwg/base-drafts] QUIC Version Ossification (#2496)

"Philipp S. Tiesel" <> Tue, 02 April 2019 09:25 UTC

Return-Path: <>
Received: from localhost (localhost []) by (Postfix) with ESMTP id 348EB1200B5 for <>; Tue, 2 Apr 2019 02:25:34 -0700 (PDT)
X-Virus-Scanned: amavisd-new at
X-Spam-Flag: NO
X-Spam-Score: -8.001
X-Spam-Status: No, score=-8.001 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_MESSAGE=0.001, MAILING_LIST_MULTI=-1, RCVD_IN_DNSWL_HI=-5, 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 Skdo00dL0Gnx for <>; Tue, 2 Apr 2019 02:25:32 -0700 (PDT)
Received: from ( []) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by (Postfix) with ESMTPS id 579901200B4 for <>; Tue, 2 Apr 2019 02:25:31 -0700 (PDT)
Date: Tue, 02 Apr 2019 02:25:29 -0700
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;; s=pf2014; t=1554197129; bh=YQYcXwT5YzEh3mTkPzhaC7nMGp/ZdGJaLYWpxxY8iMU=; h=Date:From:Reply-To:To:Cc:In-Reply-To:References:Subject:List-ID: List-Archive:List-Post:List-Unsubscribe:From; b=MxBZdkABmhT4c07ouN0mlCIIHIxP9bkcx5mSUEWWFhKVSZQtgYQknf8yzw6PeVZ3m GlYVU8oOJzbNMP+t4sQv6OLo5+/ykbW6i8H3LiHaoYu/8/9LC/rHaJwysOWv2pClzP uiIEWvINqwhU1rfT8vfAO18parSUsWDrkHb111ME=
From: "Philipp S. Tiesel" <>
Reply-To: quicwg/base-drafts <>
To: quicwg/base-drafts <>
Cc: Subscribed <>
Message-ID: <quicwg/base-drafts/issues/2496/>
In-Reply-To: <quicwg/base-drafts/issues/>
References: <quicwg/base-drafts/issues/>
Subject: Re: [quicwg/base-drafts] QUIC Version Ossification (#2496)
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary="--==_mimepart_5ca32a89a5f16_55423fca8f2d45bc58873"; 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
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: Tue, 02 Apr 2019 09:25:34 -0000

With #2573, we have now a concrete description of the version alias mechanism.

Short summary:
 - It greases the version number and nonce to encrypt the client initial against ossifying on the values for v1.
 - The mechanism is optional - can be ignored / amended / removed later without changes for the rest of the protocol.
 - Without downgrade protection, it does not protect against middle boxes that actively try to force the handshake to v1.
 - With optional downgrade protection, it can be used as an early indicator for ossification.
 - With optional mandatory protection, some people fear that more middle-boxes may drop QUIC completely.

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