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List:       cfrg
Subject:    Re: [Cfrg] [secdir]   ISE seeks help with some crypto drafts
From:       "Valery Smyslov" <smyslov.ietf () gmail ! com>
Date:       2019-03-11 8:07:22
Message-ID: 000f01d4d7e1$754d9860$5fe8c920$ () gmail ! com
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Hi Ben,

> > I would like to remind everyone that OCB is not a "new mode". It is specified in \
> > RFC 7253. This work
> generalizes the specification -- without changing the 128-bit block case -- to \
> allow other block cipher block lengths.
> 
> It's still a "distinct choice that a protocol designer (or user) picking a
> cipher has available to choose from", which is where the perceived downside
> of new things comes from.  My apologies for conflating the technical term
> with the generic.

I agree that having more options generally complicates protocol designer's life.
Unless the choices have really different properties (it terms of security, \
performance,  resources consumption etc.) which are clearly explained, so that 
the designer can make a conscious choice.

Regards,
Valery.

> -Ben
> 
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> secdir@ietf.org
> https://www.ietf.org/mailman/listinfo/secdir
> wiki: http://tools.ietf.org/area/sec/trac/wiki/SecDirReview

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