Re: [secdir] SecDir review of draft-ietf-msec-tesla-for-alc-norm-07

Vincent Roca <vincent.roca@inrialpes.fr> Wed, 16 September 2009 09:17 UTC

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Date: Wed, 16 Sep 2009 11:18:09 +0200
From: Vincent Roca <vincent.roca@inrialpes.fr>
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Subject: Re: [secdir] SecDir review of draft-ietf-msec-tesla-for-alc-norm-07
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Dear all,

My colleague, Aurélien, read carefully our new TESLA -08 I-D these
days and found a serious error (plus several minor corrections).

The error concerns section 3.1.2.1. "Principles", where we say:
	"[...] where f_k is the result of the k-th application of the
	PRF function f."
This is of course not the case since k is (in case of HMAC PRF) the
key! So we completely reformulated this section.


We also corrected a few minor things. For instance the keyword "Standard"
was used incorrectly (it's goal up to version 07 was to distinguish the
full authentication tags from the "Compact" ones, but the Compacts tags
have been removed in 08).


So we have prepared version 09 (attached), but did not submit it
using the IETF I-D tool since we don't know if it is appropriate at
this stage of the IESG process. We are awaiting your instructions.


Sorry for this late I-D update.
Cheers,


   Vincent and Aurélien