US 12,238,077 B2
Communication method, internet of things terminal, gateway device and internet of things system
Yi Bian, Beijing (CN); Kai Zhao, Beijing (CN); and Xianzhen Li, Beijing (CN)
Assigned to BOE Technology Group Co., Ltd., Beijing (CN)
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
Filed on Oct. 20, 2021, as Appl. No. 17/506,543.
Claims priority of application No. 202011150100.4 (CN), filed on Oct. 23, 2020.
Prior Publication US 2022/0131841 A1, Apr. 28, 2022
Int. Cl. H04L 9/14 (2006.01); H04L 9/08 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/0471 (2013.01) [H04L 9/0872 (2013.01); H04L 9/14 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A communication method, being applicable to an Internet of Things (IoT) terminal, comprising:
acquiring first time information and a first mask;
generating a first pointer based on the first time information and the first mask;
searching for a first key from a key table based on the first pointer;
encrypting identity information of the IoT terminal using the first key, and sending the encrypted identity information of the IoT terminal and the first time information to a gateway device;
wherein the generating the first pointer based on the first time information and the first mask comprises:
performing an exclusive OR (XOR) operation on the first time information and the first mask; and
acquiring the first pointer by taking a remainder of a result of the XOR operation to N, N being a dimension parameter of the key table.