Re: [Cfrg] Hardware requirements for elliptic curves

Peter Gutmann <pgut001@cs.auckland.ac.nz> Wed, 17 September 2014 04:41 UTC

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From: Peter Gutmann <pgut001@cs.auckland.ac.nz>
To: "cfrg@irtf.org" <cfrg@irtf.org>
Thread-Topic: [Cfrg] Hardware requirements for elliptic curves
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Date: Wed, 17 Sep 2014 04:41:02 +0000
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Subject: Re: [Cfrg] Hardware requirements for elliptic curves
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Watson Ladd <watsonbladd@gmail.com>; writes:

>Amazon's Cloud HSM doesn't have RSA blinding turned on by default, showing 
>the extent to which side channels are a concern.

I've mentioned this before in another forum, but for those who missed it an
additional data point: Some time ago I asked my users whether they wanted
blinding enabled by default, with a tiny decrease in performance.  The
response spread was: No, 100%.

(I may or may not have enabled that and a bunch of other measures anyway, 
but the point is that in the real world, no-one cares).

Peter.