Some RFID papers

Here are a few papers on the privacy implications of RFID. The basic idea behind RFID -- Radio Frequency IDentification -- is to embed all sorts of products with little tags that transmit information about the product (at least when "illuminated" by an RF reader). This technology could allow, for example, shopping checkout without removing anything from the cart.

The privacy problem occurs when users leave the store, with their tagged items (clothing, electronics, etc) still active. Wearing such tagged clothing into other stores might immediately reveal what you are wearing and who originally bought it.

Eckfeldt's and Garfinkel's papers are perhaps the best starting point.