At 4:34 AM 7/28/95, John A. Limpert wrote:
Is there a technical reason why communications through these future satellite systems couldn't be encrypted? I thought that all of these systems were based on vocoders and digital transmission, just like a secure telephone.
There should be no technical reason why voice encryption, or even end-to-end digital packet encryption, cannot be used. The various satellite systems (Iridium, Teledesic, Globalstar, etc.) also are targetting laptops, personal communicators (a la Newton, Envoy, etc.), and thus cannot afford to screw with the signal in any significant way. (And error correction codes could easily deal with even fairly massive screwing around with, should the satcom companies be foolish enough to try to "dither" the signals....which I doubt they'll ever do.) The risk is not technical, but legislative. The government of the U.S. could, for example, mandate to the satcom companies that only GAK/escrow encryption is permissable...how enforceable this is echoes the debate we've had for almost three years on such things. But the McCaw/Microsoft/Motorola/Qualcomm sorts of companies may have to make token efforts to comply. I don't expect the crypto banners to win, long run, but I would guess that right now they are jawboning with the main satellite companies to make things harder. The faster systems like "Nautilus" are deployed, the better. --Tim May .......................................................................... Timothy C. May | Crypto Anarchy: encryption, digital money, tcmay@sensemedia.net | anonymous networks, digital pseudonyms, zero 408-728-0152 | knowledge, reputations, information markets, Corralitos, CA | black markets, collapse of governments. Higher Power: 2^756839 | Public Key: PGP and MailSafe available. "National borders are just speed bumps on the information superhighway."