🚀 go-pugleaf

>You only need to create the link between the ID number and the
>person once. Forever after that, all you need is the ID number.
>
>It's like how supermarket loyalty cards work. They record who
>you are in their database when you sign up and they give you
>the card with a unique ID. From then on, all they do is scan
>the card with that ID and they know who you are.

With ubiquitous RFID, a supermarket could create "loyalty cards"
without even having to issue them or admit having them.  When you
buy something, they record the ID numbers of RFID items you have
on you other than their merchandise.  These might be in your driver's
license, credit cards, pants, shoes, wallet, etc. and the store
doesn't really have to care WHAT they are on.

To avoid thinking you are a different person every time you change
pants, items seen together often are linked together as being the
same person.  The first time they see your driver's license and
credit card.  The next time they see the credit card and your new
wallet.  The next time they see your new wallet and your running
shoes.  Now all of these are grouped together in one record.  Pretty
soon they've got a pretty good inventory list of the RFID items you
sometimes carry with you.  Some adjustment might be used to account
for shared clothing or gifts (which means they can track who you
share stuff with).

If they even once accept payment in the form of a check or credit
card, they've got your name, account number, and maybe an address
or phone number.  Now consider what happens when half of the
stores in a given city share this info with each other.

						Gordon L. Burditt