---------- From: Steve Schear[SMTP:schear@lvcm.com] Sent: Sunday, December 30, 2001 5:32 PM To: Lucky Green Cc: cypherpunks@lne.com Subject: Re: End-to-end encrypting US GSM phones?

At 09:19 PM 12/30/2001 +0100, you wrote:

...

On Sat, 29 Dec 2001, Ryan Lackey wrote:

...

I'm unclear why Lucky dislikes the Sectra Tiger (www.sectra.se); the key management is not what I'd like, but seems designed specifically for hierarchical military or corporate organizations, which is the only viable market for a EUR 2500 encrypting cellphone.

The reason why I have little faith in the Sectra Tiger is because I talked with one of Sectra's head cryptographers. Below is a brief recap of the conversation:

<recap with clueless crypto engineer deleted>

OK, so why don't we pool our funds to encourage the reverse engineering and release of source code to a popular PCS/GSM phone which can be readily re-flashed and with sufficient resources (or easily augmented) to handle this app? I'll donate $100 e-gold to get the fund going. I'll establish a

publicly viewable e-gold account to hold other contributions. The account

access key can be secret shared among a few fellow CPs.

steve

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'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 ============================================================================ ================ This e-mail, its content and any files transmitted with it are intended solely for the addressee(s) and are PRIVILEGED and CONFIDENTIAL. Access by any other party is unauthorized without the express prior written permission of the sender. If you have received this e-mail in error you may not copy, disclose to any third party or use the contents, attachments or information in any way, Please delete all copies of the e-mail and the attachment(s), if any and notify the sender. Thank You. ============================================================================ ================