security modifications to current PCs

Jonathan Thornburg jthorn at
Fri Dec 2 09:43:49 PST 2005

On Thu, 1 Dec 2005, Travis H. wrote:
> Is it possible to implement most block ciphers in FPGAs?  It'd be nice
> to have a bus-mastering crypto co-processor device to do, say, disk
> encryption without requiring CPU help, but I want to be able to update
> it to new algorithms as new attacks against the cipher appear.  I use
> some disk encryption stuff on a dual processor machine and it's still
> slow.  The load climbs to 10 or 12 all too easily, then stuff becomes
> unresponsive (perhaps because swap is one of the things I'm
> encrypting).

Have you tried the swap-encryption option in OpenBSD?  According to
the performance is pretty good.


-- Jonathan Thornburg <jthorn at>
    Max-Planck-Institut fuer Gravitationsphysik (Albert-Einstein-Institut),
    Golm, Germany, "Old Europe"
    "Washing one's hands of the conflict between the powerful and the
     powerless means to side with the powerful, not to be neutral."
                                       -- quote by Freire / poster by Oxfam

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