Re: [Cfrg] Re: [saag] Algorithm upgrades

["D. J. Bernstein" <djb at cr.yp.to>]

Bill Sommerfeld writes:
> there are only 16 bits of well-known port, and you generally need much
> more than one bit to encode sufficiently rich combinations of
> algorithm parameters

Sufficient for what, exactly?

A moment ago we were talking about the upgrade from DES to AES. That's a
one-bit switch, and obviously an important one. AES is faster and more
secure; DES is on the way out, and AES is on the way in.

Now you seem to have in mind a much more complicated set of options, and
an unstated reason that it's important to have all those options (but no
others!). What's the reason? How do you get from that reason to the
exact list of options that you have in mind?

Where can I find the archived analysis of how the exact list of options
was created? Are you sure that the options weren't simply accreted by
the typical ``Let's support every conceivable option we can document''
committee-think, without regard for actual costs and benefits?

---D. J. Bernstein, Associate Professor, Department of Mathematics,
Statistics, and Computer Science, University of Illinois at Chicago

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