Re: [Doh] Privacy Considerations Text (#2)

nusenu <nusenu-lists@riseup.net> Thu, 21 June 2018 20:07 UTC

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Date: Thu, 21 Jun 2018 20:07:00 +0000
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Subject: Re: [Doh] Privacy Considerations Text (#2)
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Patrick McManus wrote:
> We may be getting close to bridging the important points here - so we've
> made an update to the PR. (its still not merged into the working copy, but
> it has changed). and we can iterate from there. Thank you for the comments,
> and especially text proposals - they really help.

Is this iteration supposed to address or include previous comments from [1]?
I don't see [1] addressed.

Specifically it does not _explicitly_ convey that 
"DoH introduces new privacy concerns".

I propse to change:
> The privacy considerations of using the HTTPS layer in DoH are
> incremental to those of DNS over TLS.

to be more explicit about it:
"DoH introduces new privacy concerns 
when compared with DNS over UDP, TCP or TLS (RFC7858)."
(this sentence - and more - has been proposed in [1] before by others)


> The privacy considerations of using the HTTPS layer in DoH are
> incremental to those of DNS over TLS. DoH is not known to introduce
> new concerns beyond those associated with HTTPS.

Actually I think it does because it combines two protocols (DNS + HTTPS) that haven't been
combined before and DNS+HTTPS has more privacy implications than just the sum of IP, TCP, TLS and HTTP
when DoH server are not used exclusively for DoH.

Sara wrote [1]:
> [...] [DoH] introduces new privacy concerns when compared
> with DNS over UDP, TCP or TLS (RFC7858). The rationale for this decision is that 
> retaining the ability to leverage the full functionality of the HTTP ecosystem is more
> important than placing any constraints on this new protocol based on privacy considerations."

Also the rationale behind the design decision is important.

[1] https://mailarchive.ietf.org/arch/msg/doh/_ju-J52e5cf7UNpgwhCbq5pln5Y
 
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