Yes, I understand that, that is why I'm thinking of this approach. My idea was to use analog voice transforms and their inverse with properties that would preserve most of the codec performance. But it would be awfully difficult to sync up the inverse on the other end without a data connection, I expect that with voice calls that delay can be added and removed without warning.
But in terms of complexity and chance of success, it does seem like the encrypted SMS is both practical and feasible, compared to any sort of voice encryption. Maybe a composite solution? Secure voip session initiated by encrypted SMS? Is there a benfit to using smartcard SAMs for encrypted peer2peer communications with OpenMoko? SD card with SAM: http://www.sdid.com/products1010.shtml Or the GPG fellowship card: http://gnupg.org/howtos/card-howto/en/smartcard-howto-single.html Matt -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ian Stirling Sent: Thursday, April 24, 2008 4:31 PM To: List for Openmoko community discussion Subject: Re: Newbee wants to kick start - encrypted calls Crane, Matthew wrote: > Not sure if there's a specific project, I'm hoping to do some sort of > "analog" encryption, with audio effects and inverse effects, such that > it does not need to be digitally decoded, where the excellent pattern > recognition engine in the brain does most of the work. > You can't do much. It has to 'sound' voice-like to the multiple codecs in the signal chain of a GSM call, or the codec just discards the sound. Listen to a voice over a good GSM line. It's quite well reproduced. Now, listen to an assortment of music. Some will come out quite well, and be reproduced much like they came out. Some are utterly shredded. _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
