----- Original Message -----
From: "Harmon Seaver" <[EMAIL PROTECTED]>
> On Mon, Jan 27, 2003 at 08:23:15AM -0800, Major Variola (ret) wrote:
> > The versions of all the secure phones I've evaluated needed this
> > feature:
> > a minimal answering machine. With just the ability to record IPs of
> > hosts that
> > tried to call.
> >
> > (A local table can map these to your friends or their faces.
> > Of course, this table should be encrypted when not in use.)
>
> Pretty hard to do if people are using dialup. Or even dsl, unless they
run a
> linux box they don't ever reboot -- although I've found my dsl ip changing
> sometimes on it's own, and with no rhyme or reason. Cable is a little more
> stable, when I had a cable modem it didn't change ip unless I shut off the
modem
> for awhile, and not even always then.
The obvious solution is then to take it one step further, rebuild the
protocol so that there is a cryptographic identifier (probably a public key,
hopefully for ECC to save space). In a fully developed system that
identifier could also be used to make the call in the first place.
Admittedly this is unlikely to happen for quite some time, but if people
start asking for it, they'll start considering it.
Joe
Trust Laboratories
http://www.trustlaboratories.com
