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. 17, 2007
Filed:
Dec. 19, 2001
Kenneth W. Aull, Fairfax, VA (US);
Thomas C. Kerr, Fairfax, VA (US);
William E. Freeman, Arbutus, MA (US);
Mark A. Bellmore, Mt. Airy, MD (US);
Kenneth W. Aull, Fairfax, VA (US);
Thomas C. Kerr, Fairfax, VA (US);
William E. Freeman, Arbutus, MA (US);
Mark A. Bellmore, Mt. Airy, MD (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A method and computer program to revoke and update a token () having several encryption, signature and role certificates/private keys contained in the token (). The certificates/private keys in the tokenare transmitted wrapped by a public key and may only be activated by a private key contained in the token (). The activation of any certificate/private key requires the entry of a passphrase by a user (). Further, all certificates/private keys contained in a token () are stored in an authoritative database. In the event that a token () is lost then all certificates/private keys associated with the token () are revoked. Further, when new certificates/private keys are issued to a user () these certificates/private keys are encrypted using the token's () public key and downloaded to the token ().