Patent ID: 11924635
Assignee: ZHEJIANG GEELY HOLDING GROUP CO., LTD
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A security authentication method, comprising:
sending a verification request to a verification end;
receiving a first data packet and acquiring third preset data, fourth preset data, second time data, a control instruction, and fifth preset data, wherein the first data packet is determined by the verification end in response to the verification request, and the first data packet comprises: first preset data, a random number group, first time data, and first verification data;
generating a key based on the third preset data, the fourth preset data, the second time data, and the first data packet, wherein generating the key comprises:
determining second verification data based on the third preset data, the fourth preset data, the first time data, and the random number group;
determining whether the first verification data is the same as the second verification data;
if the first verification data is the same as the second verification data, determining whether a difference between the first time data and the second time data is greater than a preset time threshold; and
if the difference between the first time data and the second time data is greater than the preset time threshold, generating the key based on the fourth preset data and the first data packet;

encrypting the control instruction and the fifth preset data based on the key to generate first encrypted data; and
sending the first encrypted data to the verification end, so that the verification end sends the control instruction and the fifth preset data to an execution end, and the execution end executes the control instruction based on the following method: determining whether the fifth preset data is the same as internal preset data; and if so, executing the control instruction.