Abstract: An identity certificate may be issued to a blockchain node. The issuance may include issuing a first identity certificate to a first terminal and receiving a second identity certificate issuance request that is from the first terminal. A second identity certificate may be issued to the first terminal, and a third identity certificate issuance request is received from the second terminal. A third identity certificate is issued to the second terminal, so that the second terminal forwards the third identity certificate to the third terminal.

Abstract: A simulation method for realizing large batches and different kinds of baseboard management controllers using a single server includes providing a virtual baseboard management controller by a target terminal according to different customized virtual baseboard management controller resources correspondingly. The simulation method includes initializing large batches and different kinds of virtual baseboard controller programs according to a customizable virtual baseboard controller resource. If a client requests to access one baseboard controller or multiple baseboard controllers, which virtual baseboard controller will provide a service is determined according to the information of the accessing request of the client. Then an output result is generated according to the behaviors defined in the customized resource. Finally, the output result is transferred to the client. Therein, the client may connect to the target terminal through Internet or a bus.