[dnssd] WGLC on draft-ietf-dnssd-privacy-01

Tim Chown <Tim.Chown@jisc.ac.uk> Mon, 19 June 2017 14:24 UTC

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From: Tim Chown <Tim.Chown@jisc.ac.uk>
To: "dnssd@ietf.org" <dnssd@ietf.org>
Thread-Topic: WGLC on draft-ietf-dnssd-privacy-01
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Date: Mon, 19 Jun 2017 14:24:36 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dnssd/g1FgNNVgfPvYc3bwufJDT3N7sDA>
Subject: [dnssd] WGLC on draft-ietf-dnssd-privacy-01
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Dear dnssd WG participants,

We are initiating a WG Last Call today on draft-ietf-dnssd-privacy-01, as can be found at https://tools.ietf.org/html/draft-ietf-dnssd-privacy-01

The call will close on Friday 7th July, giving us a week to review the outcome ahead of the Prague meeting.

Please send any comments, including indications of support for progression of the document as is, to the dnssd@ietf.org list.

We intend to open a WGLC on the related pairing draft soon (draft-ietf-dnssd-pairing-01), but we believe an update will be published first. 

Abstract

   DNS-SD (DNS Service Discovery) normally discloses information about
   both the devices offering services and the devices requesting
   services.  This information includes host names, network parameters,
   and possibly a further description of the corresponding service
   instance.  Especially when mobile devices engage in DNS Service
   Discovery over Multicast DNS at a public hotspot, a serious privacy
   problem arises.

   We propose to solve this problem by a two-stage approach.  In the
   first stage, hosts discover Private Discovery Service Instances via
   DNS-SD using special formats to protect their privacy.  These service
   instances correspond to Private Discovery Servers running on peers.
   In the second stage, hosts directly query these Private Discovery
   Servers via DNS-SD over TLS.  A pairwise shared secret necessary to
   establish these connections is only known to hosts authorized by a
   pairing system.

Thanks,

Ralph and Tim
dnssd WG co-chairs