The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 05, 1999
Filed:
Oct. 23, 1997
David Michael Claus, Indianapolis, IN (US);
AT&T Corp., Murray Hill, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
Systems and methods for providing secure smart card transactions are disclosed. Smart cards are arranged in a smart card hierarchy, the hierarchy including a first smart card at a first hierarchical level and a second smart card at a second hierarchical level higher than the first hierarchical level. A smart card reader is equipped to read smart cards and to accept personal identification (PIN) number inputs. According to one embodiment, a first PIN number is stored on the first smart card, the first PIN number corresponding to the first hierarchical level. A first security key is also stored on the first smart card. A second PIN number is stored on the second smart card, the second PIN number corresponding to the second hierarchical level. A second security key is stored on the second smart card. The PIN numbers and security keys are used to selectively lock and/or unlock a smart card.