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[websec] DNS publication of HSTS and PKP header data using CAA

Phillip Hallam-Baker <phill@hallambaker.com> Wed, 08 April 2015 22:00 UTC

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From: Phillip Hallam-Baker <phill@hallambaker.com>
To: websec <websec@ietf.org>
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Subject: [websec] DNS publication of HSTS and PKP header data using CAA
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http://tools.ietf.org/html/draft-hallambaker-webseccaa-00

It is a pretty straightforward proposal:

* Use the CAA record with either the hsts or hpkp tag
* Put the same text you would have put into the CAA record value field

There are a few differences in interpretation. All we are trying to do
here is to help people to close the 'secure after first use' hole, not
replace.

Given that we have quite a bit of use of HSTS headers, providing a
mechanism for publishing this in the DNS looks like being the obvious
approach.

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