The LEI would provide a unique identification tag for every financial services entity and perhaps extend to the financial instruments they issue.

FORBES: Lehman, Lithium and Lettuce -- The Need for Unique Identifiers in Finance

Would each individual person affect the RFID tag's radio signal in a unique way?

ENGADGET: Putting your finger on it

Firms tag all of their trades with a unique identifier for each trade by customer, by stock and time, among other things, Lime Brokerage CEO Jeff Wecker says.

FORBES: SEC To Say 'Tag, You're It'

For example, the brand name and logo hang tag and distinctive pocket stitching on a pair of jeans could be registered as protectable trademarks, and the unique shape of a dress could be registered as protectable trade dress.

FORBES: Protecting Fashion Designs