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:
Oct. 11, 2022
Filed:
Jun. 08, 2020
Applicant:
Assa Abloy Ab, Stockholm, SE;
Inventors:
Assignee:
ASSA ABLOY AB, Stockholm, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 9/40 (2022.01); G07C 9/00 (2020.01); H04W 12/08 (2021.01); H04L 9/32 (2006.01); H04W 12/06 (2021.01); G07C 9/28 (2020.01); G07C 9/25 (2020.01); H04W 12/33 (2021.01); G08B 7/06 (2006.01); G08B 25/01 (2006.01); H04W 12/04 (2021.01); G06F 1/16 (2006.01); H04B 1/3827 (2015.01); G06F 21/34 (2013.01); H04W 4/80 (2018.01); H04W 12/63 (2021.01); H04W 12/68 (2021.01); G06V 40/10 (2022.01); H04W 12/64 (2021.01); H04W 88/02 (2009.01);
U.S. Cl.
CPC ...
G07C 9/00309 (2013.01); G06F 1/163 (2013.01); G07C 9/00174 (2013.01); G07C 9/00571 (2013.01); G07C 9/257 (2020.01); G07C 9/28 (2020.01); G08B 7/066 (2013.01); G08B 25/016 (2013.01); H04B 1/385 (2013.01); H04L 9/3226 (2013.01); H04L 63/0428 (2013.01); H04L 63/062 (2013.01); H04L 63/083 (2013.01); H04L 63/0853 (2013.01); H04L 63/0861 (2013.01); H04L 63/0876 (2013.01); H04L 63/108 (2013.01); H04W 12/04 (2013.01); H04W 12/06 (2013.01); H04W 12/08 (2013.01); H04W 12/33 (2021.01); G06F 21/34 (2013.01); G06V 40/10 (2022.01); G07C 9/00563 (2013.01); G07C 2009/00769 (2013.01); H04L 2463/121 (2013.01); H04W 4/80 (2018.02); H04W 12/63 (2021.01); H04W 12/64 (2021.01); H04W 12/68 (2021.01); H04W 88/02 (2013.01);
Abstract
An access control system is described in which a primary credential device has a master key and a secondary credential device has a key derived from the master key. Both the master key and the derivative key are required to gain access to the resource protected by the access control system. If the secondary credential device is lost, misplaced, or stolen, it cannot be used to gain illicit access to the protected resource, and it can be easily replaced by providing a different secondary credential device with another key derived from the master key.