RFID reader revocation checking using low power attached displays

US8710952B2 · kind B2 · utility

Assignee

• The Regents of the University of California · US

Inventors

• Gene Tsudik · Thalwil, CH
• Ersin Uzun · Campbell, US

Key dates

• Filing date: Sep 7, 2010
• Grant date: Apr 29, 2014
• Expiry date: Jul 28, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G07F7/0893
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A method of authenticating a radio frequency identification (RFID) reader to efficiently and timely check of revocation status of the RFID reader includes the steps of checking whether a given certificate is expired or revoked, and allowing a user of an RFID tag to verify that the credentials and revocation status information reported to the tag by reader is correct and current/valid before permitting information transmission from the RFID tag to the reader. An RFID tag includes a passively powered display and a user activatable control which allows the method to be carried out with the tag. The tag may include encrypted communication ability and automatic certificate revocation list checking. (This method is applicable not just to RFID but to any technology involving purely passive operation, i.e., where the tag obtains power from a reader).