Patent · US Active

Wearable misplacement

US10679440B2 · kind B2 · utility

6Cited by

11References

20Claims

0Family size

Assignee

ASSA ABLOY AB · SE

Inventors

Fredrik Carl Stefan Einberg · Huddinge, SE
Daniel Berg · Gilroy, US
Philip Hoyer · Richmond, GB

Key dates

Filing date	May 2, 2016
Grant date	Jun 9, 2020
Priority date	—
Expiry date	Dec 10, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH04W88/02
WIPO fieldDigital communication
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.