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Re: [babel] HMAC Key rotation key format (was ripemd)

Markus Stenberg <markus.stenberg@iki.fi> Tue, 04 December 2018 18:33 UTC

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From: Markus Stenberg <markus.stenberg@iki.fi>
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Date: Tue, 4 Dec 2018 20:33:39 +0200
Cc: Juliusz Chroboczek <jch@irif.fr>, =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= <toke@toke.dk>, babel-users <babel-users@lists.alioth.debian.org>, Babel at IETF <babel@ietf.org>
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References: <CAA93jw5fHRm21yEJsabiiOF1ZP7Zh3M_gEgRo0imBOpRGhf0qA@mail.gmail.com> <87in0koun6.wl-jch@irif.fr> <87in0kx98o.fsf@toke.dk> <CAA93jw5gaYgyUX-ABX156_TnFX25Sy5SLyuRgd28fMLfRW4UHA@mail.gmail.com> <871s78x7z0.fsf@toke.dk> <CAA93jw6268QC1kmHEasJ-FbyXL_mgfQc_C-6cdksHd02ceb2Kw@mail.gmail.com> <875zwb1shp.wl-jch@irif.fr> <CAA93jw48gei70oU+=Dyw-u778mUq4T_jXZWt0A6p3boJxG2Fwg@mail.gmail.com>
To: Dave Taht <dave.taht@gmail.com>
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Subject: Re: [babel] HMAC Key rotation key format (was ripemd)
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For interconnected domains and whatever, I would rather just use DTLS with relatively shortlived and auto-renewed certs (real-time revocation is hard to do if you are authenticating routing - chicken 'n' egg problem; one alternative is of course some sort of manual blacklisting if you want to go with long-lived certs).  

If HNCP is in picture, DNCP trust based consensus model is also an option - with it, (self-signed) certificates can have long lifetime as their usefulness is determined by consensus of nodes -> as long as there's only few compromised nodes, you can blacklist them in real time if you control the rest of the nodes.

Cheers,

-Markus

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