[dnssd] I-D Action: draft-ietf-dnssd-privacyscaling-00.txt

internet-drafts@ietf.org Mon, 01 October 2018 05:29 UTC

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Date: Sun, 30 Sep 2018 22:29:20 -0700
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Subject: [dnssd] I-D Action: draft-ietf-dnssd-privacyscaling-00.txt

A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Extensions for Scalable DNS Service Discovery WG of the IETF.

Title : DNS-SD Privacy Scaling Tradeoffs
Author : Christian Huitema
Filename : draft-ietf-dnssd-privacyscaling-00.txt
Pages : 13
Date : 2018-09-30

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.

The draft currently progressing in the DNS-SD Working Group assumes
peer-to-peer pairing between the service to be discovered and each of
its clients. This has good security properties, but creates scaling
issues, because each server needs to publish as many announcements as
it has paired clients. This leads to large number of operations when
servers are paired with many clients.

Different designs are possible. For example, if there was only one
server "discovery key" known by each authorized client, each server
would only have to announce a single record, and clients would only
have to process one response for each server that is present on the
network. Yet, these designs will present different privacy profiles,
and pose different management challenges. This draft analyses the
tradeoffs between privacy and scaling in a set of different designs,
using either shared secrets or public keys.

The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-ietf-dnssd-privacyscaling/

There are also htmlized versions available at:
https://tools.ietf.org/html/draft-ietf-dnssd-privacyscaling-00
https://datatracker.ietf.org/doc/html/draft-ietf-dnssd-privacyscaling-00

Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.

Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/

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