US 12,394,268 B2
Distributed one-time-use entry code generation for physical access control method of operation and mobile systems
Hsin-Cheng Chiu, Bethesda, MD (US); and Steven Mark Bryant, Sterling, VA (US)
Assigned to Brivo Systems, LLC, Bethesda, MD (US)
Filed by Brivo Systems, LLC., Bethesda, MD (US)
Filed on Sep. 24, 2022, as Appl. No. 17/952,243.
Application 17/952,243 is a continuation in part of application No. 16/458,044, filed on Jun. 29, 2019, granted, now 11,777,996.
Application 16/458,044 is a continuation in part of application No. 15/390,507, filed on Dec. 25, 2016, abandoned.
Prior Publication US 2023/0019653 A1, Jan. 19, 2023
Int. Cl. G07C 9/21 (2020.01); H04L 9/32 (2006.01); G07C 9/00 (2020.01)
CPC G07C 9/21 (2020.01) [H04L 9/3228 (2013.01); G07C 2009/00769 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of physical access control of a mobile device by a physical access system including a server in communication with mobile devices, the method comprising:
at a panel controlling a door actuator:
transmitting a beacon packet containing a reader identifier;
at a mobile device:
storing, in non-transitory storage, a user identifier, a user access credential and a first timestamp associated with a first access request;
receiving the reader identifier;
retrieving, from the non-transitory storage, the user identifier and the user credential;
determining an interval between the first timestamp and a second timestamp read from a system clock of the mobile device;
hashing the door identifier, the user credential, and the interval;
constructing a second access request packet from a result of the hashing, the door identifier and the user identifier;
transmitting the second access request packet to the panel;
at the panel:
receiving the access request packet from the mobile device;
parsing the access request packet for the user identifier and the door identifier;
retrieving, from a memory, the user credential associated with the user identification and the door identifier;
determining a plurality of intervals for the mobile device from the timestamp;
determining a plurality of acceptable intervals for the user credential; and
actuating a portal when any access request contains one of the plurality of acceptable intervals.