> Even if you could get people chipped, it wouldn't be too long before > a way is > found around it. If one were serious enough about this you could make an extremely secure system. Step one is to make something like the "rolling code" car ignition systems which are reasonably uncrackable by normal means. One can extend the key length as desired to make it more secure as long as your fundamental algorithm doesn't have a trapdoor or weak spot. If you can make the 'chip' approximately impossible to open without destroying it that gets you a system where the chip is always an original one. The baddies now must remove the chip intact and embed it in another person to spoof it. They "cannot" substitute dummy ones that return valid data as long as you manage the security of your own systems against intrusion. This is, of course, impossible, but one can dream. Step two is to make the system unable to be removed without destroying the host. Some people may have issues with this. So, step three two is to read some adequately unfalsifiable biometric data from the subject at the same time as you read the 'chip'. This would need to be something like a DNA analysis. (Makes Bourne supremacy (I think it was) finger prints on plastic, and James Bond retina images on contact lenses (the better to steal your Vulcan (Victor?) Nuke bomber with) look tame. Care needs to be taken that the sample cannot be spoofed. eg urine, saliva, mouth swabs, hair or skin flakes and the like could all be substituted by people who are *REALLY* keen to do a swap, but that's a really really big really. Something like an epidural sample would probably be reliable :-) You can wake up now, the nightmare's finished :-) For the next decade or so anyway. RM -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist