Re: [ietf-privacy] Fwd: draft-huitema-dnssd-privacy-01.txt

S Moonesamy <> Thu, 23 June 2016 09:59 UTC

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Date: Thu, 23 Jun 2016 02:53:09 -0700
To: Tim Chown <>,
From: S Moonesamy <>
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Subject: Re: [ietf-privacy] Fwd: draft-huitema-dnssd-privacy-01.txt
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Hi Tim,
At 05:18 22-06-2016, Tim Chown wrote:
>We're encouraging discussion of privacy considerations in the WG. As 
>a result, we now have a draft (see below), including an initial 
>proposal for a solution, for which we'd welcome wider review. The 
>draft also addresses mDNS/DNS-SD privacy within single subnet scenarios.

One of the privacy issue identified in the draft (Section 2.4) is 
device fingerprinting.  In Section 3.1, it is proposed to solve the 
privacy issues described in Section 2.1 by obfuscating instance 
names.  If I had to pick one privacy threat for that I would choose 
"correlation".  Obfuscating service names would not address that.

If I understood the draft correctly, the solution "to prevent 
tracking over time and location, different string values would be 
used at different locations, or at different times".  QR-codes are 
used to generate a shared secret and establish trust between two or 
more "friends".

The draft identifies the problem.

S. Moonesamy