RFID READER REVOCATION CHECKING USING LOW POWER ATTACHED DISPLAYS
First Claim
1. A method of authenticating a certificate of a passive and contactless reader to perform an efficiently and timely revocation and/or expiration status check of the reader certificate, comprising:
- machine checking whether the certificate is on a certificate revocation list (CRL) or a similar structure or not by using a processing circuit;
displaying a date to a user; and
contingently permitting information transmission from a tag to the reader by allowing the user of the tag to verify that the certificate expiration is in the future and the certificate revocation status reported to the tag by RFID reader is current.
2 Assignments
0 Petitions
Accused Products
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).
28 Citations
18 Claims
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1. A method of authenticating a certificate of a passive and contactless reader to perform an efficiently and timely revocation and/or expiration status check of the reader certificate, comprising:
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machine checking whether the certificate is on a certificate revocation list (CRL) or a similar structure or not by using a processing circuit; displaying a date to a user; and contingently permitting information transmission from a tag to the reader by allowing the user of the tag to verify that the certificate expiration is in the future and the certificate revocation status reported to the tag by RFID reader is current. - View Dependent Claims (2, 3, 4, 5, 6, 10, 11)
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7. A system for authenticating a radio frequency identification (RFID) reader to efficiently and timely check of revocation status of the RFID reader comprising:
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circuit means for machine checking whether a given certificate is on a certificate revocation list (CRL) or not; and a display for allowing a user of an RFID tag to verify that the credentials reported to the tag by the RFID reader is current and not revoked before permitting electronic information transmission from the RFID tag to the RFID reader. - View Dependent Claims (8, 9)
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12. An RFID tag comprising:
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a passively powered processing circuit for storing and communicating encrypted information; a portable package including the processing circuit, the package capable of being personally ported by an individual; a passively powered display included in the package coupled to the processing circuit. - View Dependent Claims (13, 14, 15, 16)
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17. An RFID tag attended by an individual for use in combination with an RFID reader comprising:
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a display capable of showing a date; a control for making the tag temporarily inaccessible to the reader; a calculator to calculate an expiration date of revocation status information by knowing its issuance date; and a count-down timer. - View Dependent Claims (18)
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Specification