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Re: [arch-d] Comments on draft-iab-protocol-maintenance-03

Henning Schulzrinne <hgs@cs.columbia.edu> Fri, 10 May 2019 17:54 UTC

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From: Henning Schulzrinne <hgs@cs.columbia.edu>
Date: Fri, 10 May 2019 13:53:46 -0400
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To: Ted Hardie <ted.ietf@gmail.com>
Cc: Martin Thomson <mt@lowentropy.net>, S Moonesamy <sm+ietf@elandsys.com>, architecture-discuss@ietf.org
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Subject: Re: [arch-d] Comments on draft-iab-protocol-maintenance-03
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One interesting thought in the slides related to the discussion,
paraphrased: high "surface" variability in protocols and their
implementation provides tracking metadata, making it easier to identify
users even if they are not identified explicitly. In other words, if every
implementation sticks to the same wire format, without non-semantic
variability, it's a lot harder to track people. I know that there are
companies that use SIP signaling variability to identify originating
carriers. (In that case, it seems to be helpful for fraud detection.)

Henning


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