End-to-end encrypting US GSM phones?

[Ryan Lackey]

Quoting Trei, Peter <ptrei at rsasecurity.com>:

> Ryan suggested earlier that the Ipaq with Fireball isn't up to the task.
> I don't think this is correct. I point you to
> 
> http://www.stanford.edu/class/cs344/staff/group10/final_report.pdf
> 
> in which some Stanford students produce a wireless ipaq2ipaq
> VoIP system. Biggest problem is that it's simplex, not because
> of cpu limitations but rather that the Compaq HW can listen or
> make noise, but not both simultaneously. Using a headset which
> interfaces through the expansion port might enable you to 
> avoid this problem (and the BT headset could also offload the
> codec). A 206 MHz Ipaq would, I think have sufficient HP to 
> do the crypto.
> 

I didn't mean the imply the Ipaq CPU (200MHz StrongARM) would be
insufficient, merely that from usability standpoint.

The "holy grail" would be working on 16-33MHz *dragonball* (== 68000)
processors.  *That* would be impressive.  Doing this on a strongarm is easy.

I'm not sure what the audio output from the ericsson bluetooth headset
is, when it connects to a PDA.

I've asked Monty (the ogg guy) and some others, and they think a 50MHz
ARM7 is more than sufficient for the compression; getting it down a
33MHz 68000 (like in the recent high-end palm devices) would be cool.

> I've toyed with the idea of porting SpeakFreely to Ipaq, but have
> not actually done anything at this point.
> 
> I've x-posted to coderpunks, since that group is more germane.
> Serious further discussion should be over there, IMHO.
> 
> Peter Trei
> 
> 
> 
> 
> 
> 
> 
> 
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-- 
Ryan Lackey [RL7618 RL5931-RIPE]	ryan at havenco.com
CTO and Co-founder, HavenCo Ltd.	+44 7970 633 277 
the free world just milliseconds away	http://www.havenco.com/
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