[Ach] rfc7525

Aaron Zauner azet at azet.org
Mon Jun 1 15:20:23 CEST 2015

Hi Ian

ianG wrote:
> Thanks to Aaron, Max and Maciej!
> Yes I can see the point.  What I was worried about originally is that,
> as Aaron points out, it's a point in time document and therefore cannot
> provide timely advice.  But if it is done at a high enough level then
> that I guess works out.

During the preparation of this BCP this has come up repeatedly. I think
there're still plans to update the BCP if need be (or, for example, a
newer protocol version get's introduced, e.g. TLS 1.3).

> (This is also in my context of some work going on at IETF WGs aimed at
> improving the pre-design approaches to crypto protocols.  Some of us are
> hoping to reduce the choice in future protocols in as many ways as we
> can so the load on sysadms & users is reduced.)

I've just updated my document on OCB mode. I know you don't like
agility, I'm somewhat on your side and reducing the effective number of
available cipher-suites is, in my opinion, an important step. But we
also need secure blockcipher modes that work without hardware-specific
instructions with high-performance on multiple architectures. GCM
completely fails in that regard.



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