The Crisis with Remailers

[R.Hirschfeld at cwi.nl]

> Date: Wed, 22 May 1996 15:04:04 -0400
> From: "Perry E. Metzger" <perry at piermont.com>
> 
> Floating point systems are built to do approximate math on a very wide
> range of number sizes. Accounting systems require exact math -- down
> to the cent. Floats aren't suitable.

I completely agree.  But are the usual fixed-point representations
adequate for exchange rates, where it's not a matter of "down to the
cent" but of ratios of cents and centimes?  Is an exact representation
of rationals (e.g., pairs of integers) needed?