Re: [SVHMPC] Phone Call Security

2007-06-05 Thread Bradley Hook
Paul Lambert wrote: >> As I understand it, the hard part is doing key exchange, because for >> effective fast encryption you frequently swap out mid-sized symmetric >> keys that are traded using asymmetric encryption (right? correct me if >> I'm wrong). > Ok ... you're wrong :-) Key exchange is

Re: [SVHMPC] Phone Call Security

2007-06-05 Thread Brian Padalino
According to: http://www.vocal.com/index.html All the GSM vocoders listed support a mode for data and facsimile distinction versus voice. So it appears as if the modes exist to get a decent data channel over the encoded voice. This yields the question: can you actually get the encoded digital

Re: [SVHMPC] Phone Call Security

2007-06-05 Thread Florent THIERY
In any case, between openmoko devices encrypted calls would imply having a personal server, as P2P communication is almost always prevented inside a GPRS network (at least in France, it is). The mokoslug distro for NSLU2 becomes more and more promising :)

RE: [SVHMPC] Phone Call Security

2007-06-04 Thread Paul Lambert
> -Original Message- > From: [EMAIL PROTECTED] [mailto:svhmpc- > [EMAIL PROTECTED] On Behalf Of Bradley Hook > > Since all of the communications of a cell phone are digital (nothing is > analog between mic and speaker), encrypting the voice data stream should > be rather trivial (at l

Re: Phone Call Security

2007-06-04 Thread Bradley Hook
Since all of the communications of a cell phone are digital (nothing is analog between mic and speaker), encrypting the voice data stream should be rather trivial (at least is in my understanding of the universe), even if you have to resort to implementing a "virtual" mic device that emits an encry

Re: Phone Call Security

2007-06-04 Thread Bradley Hook
CALEA amd such impose mandates on communications providers, not end users. In fact, one of the popular ideas floating around right now to deal with the CALEA mandate is to simply tell all of your users to turn on IPSEC, which is host-based, and then the feds can tap whatever they want. CALEA (speci

Re: Phone Call Security

2007-06-04 Thread Mikko Rauhala
[Recipients list pruned...] ti, 2007-06-05 kello 01:14 +0200, Florent THIERY kirjoitti: > An option would be some kind of "push-to-talk" : record mp3, crypt > mp3, PUT mp3 (on a webserver/scp) -- download mp3, decrypt, listen. Yeah, this has been discussed also. One could stick it on top of Jabbe

Re: Phone Call Security

2007-06-04 Thread Florent THIERY
An option would be some kind of "push-to-talk" : record mp3, crypt mp3, PUT mp3 (on a webserver/scp) -- download mp3, decrypt, listen. I'm not sure this would circumvent the legislative context; for instance, is writing encrypted sms illegal ? (i mean, by hand...) Regards Florent _

Re: Phone Call Security

2007-06-04 Thread Matthew S. Hamrick
No.. as far as I know, the encryption is an integral part of the protocol. Though Martin Tomasek tells me he's seen carriers that don't operate with encryption turned on. But in any event, I'm pretty sure that if the network does GSM encryption, your phone can't request a non-encrypted chan

Re: Phone Call Security

2007-06-04 Thread Pander
Matthew S. Hamrick wrote: ... Could it be possible to have you GSM request a non-encrypted channel? Would this channel provide more bandwidth or less delay because of that? If so, the extra bandwidth or reduced delay could be used for efficiently using your own encryption. Can anyone elabora

Re: Phone Call Security

2007-06-03 Thread Raphaƫl Jacquot
Matthew S. Hamrick wrote: terrorists," let me just remind you that outside the US, there's some pretty clear evidence that national governments are eavesdropping on the conversations of traveling tech company executives and passing economic intelligence along to competing companies in their own

Re: Phone Call Security

2007-06-03 Thread Matthew S. Hamrick
Encrypted voice calls is a question that's been around for a while. When I worked for RSA and later Certicom, we had frequent discussions about the strength (or lack thereof) of the LFSR-based encryption that was then in frequent use in GSM phones. I should probably mention that GSM and CDM

RE: Phone Call Security

2007-06-03 Thread Dean Collins
> -Original Message- > From: [EMAIL PROTECTED] [mailto:community- > [EMAIL PROTECTED] On Behalf Of Mikko Rauhala > Sent: Sunday, 3 June 2007 9:09 AM > To: community@lists.openmoko.org > Subject: Re: Phone Call Security > Either way, at least > Moko-to-Moko e

Re: Phone Call Security

2007-06-03 Thread Mikko Rauhala
su, 2007-06-03 kello 07:08 +0200, Ortwin Regel kirjoitti: > IIRC there has been lots of discussion about this a few months back. > Take a look at the mailing list archives or the wiki if you can find > it! Spesifically, see subjects "Voice over GPRS?" and "Encrypting voice communications" in the F

Re: Phone Call Security

2007-06-02 Thread Ortwin Regel
IIRC there has been lots of discussion about this a few months back. Take a look at the mailing list archives or the wiki if you can find it! On 6/3/07, Zack Shivers <[EMAIL PROTECTED]> wrote: I am curious if there are any methods of on-the-fly voice encryption that could be used for secure ca

Phone Call Security

2007-06-02 Thread Zack Shivers
I am curious if there are any methods of on-the-fly voice encryption that could be used for secure calls on the OpenMoko platform. Does anyone think this would be a worthwhile project for the future? ~Zack ___ OpenMoko community mailing list community@l