US 12,149,622 B2
User state tracking system and operating method thereof
Dongku Han, Suwon-si (KR); Lakshmi Prasanna Jasti, Bangalore (IN); Hyeonwoo Noh, Hwaseong-si (KR); Keunyoung Park, Seongnam-si (KR); Sungbo Ahn, Hwaseong-si (KR); Jiyoung Yu, Gwacheon-si (KR); Eunjin Youn, Suwon-si (KR); Bora Hyun, Hwaseong-si (KR); Jongchul Kim, Suwon-si (KR); and Jaesik Oh, Suwon-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed on Nov. 5, 2021, as Appl. No. 17/520,315.
Claims priority of application No. 10-2021-0046097 (KR), filed on Apr. 8, 2021.
Prior Publication US 2022/0329426 A1, Oct. 13, 2022
Int. Cl. H04L 29/06 (2006.01); G06F 11/34 (2006.01); H04L 9/08 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/3213 (2013.01) [G06F 11/3438 (2013.01); G06F 11/3476 (2013.01); H04L 9/0822 (2013.01); H04L 9/3236 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A user log information output system comprising:
a first user device configured to generate first user information by encrypting a unique identification (ID) of a first user according to a scheduled time, wherein the first user device includes a processor, a memory and an interface;
a first user server configured to generate first server information, the first server information including a server group code of a hierarchical server group;
a second user device configured to receive real-time token information from the first user device, the real-time token information being generated based on the first user information and the first server information, wherein the second user device includes a processor, a memory and an interface; and
a second user server configured to generate proximity log information regarding the first user by reading the first user information and the first server information of the real-time token information in the real-time token information received from the second user device,
wherein the first user device or the first user server generates the first server information, and wherein the first server information is based on a first unique ID that includes time information in first time units, a counter value, and a first encryption algorithm, and
wherein the first user device and the first user server are further configured to generate a second unique ID including time information based on second time units that are within a first time unit, and wherein the generation of the second ID is based on the first unique ID generated in the first time units, an encryption key, and a second encryption algorithm and wherein the encryption key is shared by the first user device and the first user server.