[Iris7]

Of course you are correct that the "GPS" system could not work as described.

A two way fully encrypted Diffie-Hellman handshake system could be made to work with sufficiently complex control chips. Of course the chips must erase their memories according to instructions, when being x-rayed, opened, chilled to excess, etc. and communicate with other chips in it's system only in a fully hard crypto way. The growth industry would be finding larger prime numbers.

The nationwide communication network needed would make the Internet look like a toy.

Probably when the Feds buy this wonderful system it will have been designed and built by the Chinese.

I am talking in jest, about 10%. Unfortunately the system is buildable. Shucks, just put the system in a chrome steel welded on neckband that cannot be removed without explosive decapitation. Just hope the darn thing's software wasn't written by Microsoft!

Dark visions, dark visions. Sometimes people say I have a strange sense of humor! Can you believe it?

[adamsjas]

A two way fully encrypted Diffie-Hellman handshake system could be made to work with sufficiently complex control chips. Of course the chips must erase their memories according to instructions, when being x-rayed, opened, chilled to excess, etc. and communicate with other chips in it's system only in a fully hard crypto way. The growth industry would be finding larger prime numbers.

Baffle gab.

Nothing more complex than cell phone technology is needed to track cars. They determine their position with gps, and echo that position along with their vin number, either on sat frequencies as used by On Star, or simple cell frequencies . No encryption necessary.