> -----Original Message----- > From: William Bowen [mailto:[EMAIL PROTECTED] > Sent: Thursday, October 20, 2005 3:40 PM > To: CF-Community > Subject: Re: googlezon > > > Just an interesting example of tracking. Not specifically rfid paranoia. > > ah. okay. I do like the map, I think it's pretty cool. The fact that > it is made from data that is essentially public is cool, too. > > What I looking for clarification on the the RFID/distance traceable > thing...
As I understand it the nominal distance for passive tags (tags without power sources) is around 10 feet or so at most. Passive tags can also store only minimal information. Passive tags can be itty-bitty - small enough for sub-dermal installation - and don't need maintenance. Active tags (tags with power sources) can store more information and a range commensurate with their antennas and power sources; but most can be read within, say 100 feet. Active tags are also much (much) more expensive to create and maintain however so they are pretty rare. They are also larger (of course). Jim Davis ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Protect Your PC from viruses, hackers, spam and more. Buy PC-cillin with Easy Installation & Support http://www.houseoffusion.com/banners/view.cfm?bannerid=61 Message: http://www.houseoffusion.com/lists.cfm/link=i:5:177669 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/5 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:5 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.5 Donations & Support: http://www.houseoffusion.com/tiny.cfm/54
