US 12,335,269 B2
Access management system and access management method
Seong Bin Choi, Seongnam-si (KR); and Young Soo Moon, Seoul (KR)
Assigned to SUPREMA INC., Seongnam-si (KR)
Filed by SUPREMA INC., Seongnam-si (KR)
Filed on Jan. 30, 2024, as Appl. No. 18/427,707.
Application 18/427,707 is a continuation of application No. 17/901,712, filed on Sep. 1, 2022, granted, now 11,888,852.
Application 17/901,712 is a continuation of application No. 17/365,809, filed on Jul. 1, 2021, granted, now 11,470,087, issued on Oct. 11, 2022.
Application 17/365,809 is a continuation of application No. PCT/KR2019/018186, filed on Dec. 20, 2019.
Claims priority of application No. 10-2019-0000384 (KR), filed on Jan. 2, 2019.
Prior Publication US 2024/0205223 A1, Jun. 20, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 7/04 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/101 (2013.01) [H04L 63/0442 (2013.01); H04L 63/083 (2013.01); H04L 63/0876 (2013.01)] 16 Claims
OG exemplary drawing
 
1. An access control method of an access control device that authenticates access to a user terminal using an advertising packet, the access control method comprising:
transmitting the advertising packet to the user terminal, wherein the advertising packet includes a first public key and identification information of the access control device;
receiving a first packet from the user terminal, wherein the first packet includes variable information encrypted based on the first public key;
loading a first private key corresponding to the first public key;
decrypting the encrypted variable information using the first private key; and
determining whether to open a door or not based on the decrypted variable information,
wherein the transmitting the advertising packet to the user terminal and the receiving the first packet from the user terminal are performed before a communication channel is established through frequency synchronization between the user terminal and the access control device such that the access control device enables door opening control using data from the first packet received prior to the establishment of the communication channel.