Blueberry encryption for boston pigs?

[Trei, Peter]

> Eric Murray[SMTP:ericm at lne.com]
> 
> On Tue, Jan 15, 2002 at 11:37:03AM -0800, georgemw at speakeasy.net wrote:
> > On 15 Jan 2002, at 10:26, Eric Murray wrote:
> > 
> > > On Tue, Jan 15, 2002 at 10:44:46AM -0600, xganon wrote:
> > > > 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










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