Patent ID: 11943373
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Digital communication (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 12:
13. A certificate authority system for issuing an identity certificate to a blockchain node in a blockchain network, wherein the blockchain node comprises a first terminal, a second terminal, and a third terminal, wherein the certificate authority system comprises:
a first-tier certificate authority node configured to issue a first identity certificate to the first terminal;
a second-tier certificate authority node configured to issue a second identity certificate to the first terminal in response to a second identity certificate issuance request that is from the first terminal and that is made by using the first identity certificate, so that the first terminal forwards the second identity certificate to the second terminal, the second identity certificate issuance request being generated in response to a registration request transmitted by the second terminal to the first terminal; and
a third-tier certificate authority node configured to issue a third identity certificate to the second terminal in response to a third identity certificate issuance request that is from the second terminal and that is made by using the second identity certificate, such that the second terminal forwards the third identity certificate to the third terminal, and the third identity certificate issuance request is generated in response to a registration request transmitted by the third terminal to the second terminal having the second identity certificate.