Spread Spectrum Digital Modem? 10
GlassWalkerTheurge asks: "I was wondering if anyone is aware of any spread spectrum digital modem technology that would make a mobile location (i.e. car, etc.) able to create a secure link to a ground station (i.e. home etc.) using multiple (say 4) digital cell phones on both ends. The traffic would be encrypted and spread over the 4 digital modems according to an algorythm available to both sides (negotiated when the secure link is established.) If it does not exist, anyone know if it is doable? I was thinking using a hardware encryption based on a periodically changed key (physical card?) that contained a 4096 bit key (software encryption type). An idea for my dream car."
Re:Come on /. you can do better. (Score:1)
Re:good idea, but (Score:1)
Re:ricochet? (Score:1)
One major flaw (Score:1)
good idea, but (Score:1)
the biggest problem i would find with this is cost, having 4 cell phones on each end on and connected would be quite expensive
Better solutions exist...maybe. (Score:1)
Several companies produce fast wireless LAN solutions that--depending on distance--can provide higher performance at a lower-cost than running four cell phones concurrently.
Enterasys [enterasys.com] (part of the former cabletron) offers the DEC wireless network technology. I noticed they have a press release about the use of such a system in Australia on today's press release. Pacific Wireless rolls out Wireless IP [enterasys.com]
Come on /. you can do better. (Score:2)
Anyway, at least check the old /. archives for anything relavent to the question. Look at the Megacar [slashdot.org]. 1 car, 16 cell phones.
A wealthy eccentric who marches to the beat of a different drum. But you may call me "Noodle Noggin."
ricochet? (Score:2)
unfortunately they only cover high populated areas, so you could use it for your work commute but it wouldn't work for your holiday trip going out of town...
greetings, eMBee
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EQL + crypto VPN + modems (Score:2)
Notice that whether the phones use spread spectrum at the hardware level or not, they can still be theoretically monitored. And any collection of phones will be hard to monitor, as they'll be using their usual methods of avoiding interference with each other -- whether they use TDM, multiple frequencies, whatever. Or use several different types of phones with different types of networks...
Encryption is faster than you think (Score:3)
I think this is with a 5000 RPM disk.
While on this topic, please read my page on Why You Should Use Encryption [goingware.com]
While encryption is indeed computationally expensive, it is not nearly as computationally expensive as badly written GUI code, and that's what's usually running on modern computers. Encryption software is generally quite optimized, while the crud we call shrink-wrap software is a poor excuse for engineering.
I also refer you to the Risks Forum [ncl.ac.uk]