Patent ID: 9659422
Date: 2017-05-23
CPC Classifications: G07C,H04W

Claim:
1. A method of managing access by a user, comprising: requesting an access code from an external server; the external server providing the access code to the user only if the user is authorized for access; the access code being provided to an input unit; and the user being granted access by a security component if the access code is valid, wherein the security component determines validity of the access code without accessing any user authorization information, wherein the access code is based, at least in part, on a master key at the external server and wherein the security component determines validity of the access code using a unique symmetric key that is derived from the master key and wherein the unique symmetric key is derived from the master key in combination with one of: a serial number of the security component and a serial number of a component associated with the security component.