RFID

The Guardian: Tesco tests spy chip technology - Article in which Tesco gets accused of tagging packs of razor blades to track buyers. <small>(July 19, 2003)</small>
http://www.guardian.co.uk/uk_news/story/0%2C3604%2C1001211%2C00.html

The Nation: The Trouble with RFID - Long article about privacy concerns related to the technology. <small>(February 4, 2004)</small>
http://www.thenation.com/doc.mhtml?i=20040216&s=garfinkel

Forbes.com: A Hacker's Guide To RFID - Article on RFID tag security, with links to related articles. <small>(July 29, 2004)</small>
http://www.forbes.com/business/commerce/2004/07/29/cx_ah_0729rfid.html

Wikipedia: Radio-frequency identification - Article in this online open encyclopedia..
http://en.wikipedia.org/wiki/Radio-frequency_identification

csmonitor.com - Can your razor blade spy on you? - Radio frequency identification tags could simplify inventory, but they worry privacy advocates. <small>(November 6, 2003)</small>
http://www.csmonitor.com/2003/1106/p14s01-stct.html

Ross Mayfield's Weblog: RFID Hacks - Weblog entry argues that the more people grapple with RFID to learn how it operates and how it can be manipulated, worries about its misuse should decrease.
http://ross.typepad.com/blog/2003/08/rfid_hacks.html