Eric Murray[SMTP:ericm@lne.com]

On Tue, Jan 15, 2002 at 11:37:03AM -0800, georgemw@speakeasy.net wrote:

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On 15 Jan 2002, at 10:26, Eric Murray wrote:

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On Tue, Jan 15, 2002 at 10:44:46AM -0600, xganon wrote:

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We are interested in the 'encryption' used in these over-the-air queries...

ARDIS, the protocol the Blackberry uses, does an XOR with a 32 bit constant of the day.

Eric

You're kidding, right?

Probably not. I haven't seen the spec so I'm not 100% sure, but this is the info I dug up after 10 minutes of googling. http://www.counterpane.com/crypto-gram-9904.html

Eric

I've done a little work with Blackberries (aka RIM pagers). I can't answer for ARDIS (which is the network), but on top of that, the pagers run their own protocol. This is encrypted with 3DES, using shared secret keys agreed between the device and the server while the device is being sync'd in it's cradle. I don't know how the keys are derived, or how often they are changed. The system seemed reasonably non-snakeoily to me, at least against aerial intercepts. 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. ============================================================================ ================