XPost: uk.politics.misc, alt.politics.british, alt.conspiracy.new-world-order   
   From: 123456@freeserve.co.uk   
      
   Receiving a GPS signal through a human body would be hard.   
   > These devices are not particularly small.   
   > You need to power it.   
      
   Not now but they way things change in technology say 20 years from now the   
   chip will be the size of a pin head and powered by your own bodies natural   
   electricity.   
   Just a guess ;)   
      
      
   "Alun Harford"  wrote in message   
   news:e5ahq4$9pl$1@gemini.csx.cam.ac.uk...   
   > "Stephen Glynn"  wrote in message   
   > news:4drmu0F1b4c59U1@individual.net...   
   >    
   >   
   > If you want to get a trackable thing for your cat, then it's very   
   > possible. You need to put a GPS and a mobile phone together, and add some   
   > hardware to get the two to talk to each other. Then you can call up the   
   > chip and it tells you where it is. The problems are:   
   >   
   > Recieving a GPS signal through a human body would be hard.   
   > These devices are not particularly small.   
   > You need to power it.   
   >   
   > Another *much* harder problem to solve (with respect to kidnapping   
   > children or tracking stolen goods) is that you could kill the tag very   
   > easily with a small EMP device. A modified camera flash like here:   
   > https://events.ccc.de/congress/2005/wiki/RFID-Zapper(EN)   
   >   
   > Is probably sufficient.   
   >   
   > Alun Harford   
   >   
      
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