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Re: Address privacy

Brian E Carpenter <brian.e.carpenter@gmail.com> Sun, 26 January 2020 22:00 UTC

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Subject: Re: Address privacy
To: "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>
Cc: 6man WG <ipv6@ietf.org>
References: <6f2a8e5a-a4f6-219b-d7c8-ba79ed257785@huitema.net> <233CE79D-B9BF-4335-8568-D178BD10CEAC@puck.nether.net> <CABNhwV2faDm=8t8KqNVJ5rWkU8or=0pyGmN8D8OyWj1S9ujVhg@mail.gmail.com> <CABNhwV2gY71PrjWQBUdtCU2Og_R3QawLNcANgVmov_3vJz4CvQ@mail.gmail.com> <31ec4e557f8846599f1161ccdf86348b@boeing.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <18573398-e564-d7a4-d35c-fe72f117362b@gmail.com>
Date: Mon, 27 Jan 2020 10:59:55 +1300
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On 27-Jan-20 10:39, Manfredi (US), Albert E wrote:
...
> This seems like a good default, no? The business about "privacy" concerns not so much the type of privacy that data encryption would provide, but rather, being able to track an individual in his/her travels. Changing the IID only when the prefix changes should prevent that well enough?

The IID is normally set *before* the host generates its Link Local address, which is normally before it starts to listen for RAs from which it will learn the current prefix(es).

So you'd have to make the IID for SLAAC independent of the IID for LL (which is of course exactly what RFC4941 does).

   Brian

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