Abstract: A lock, a vehicle parking system, and a vehicle parking method are provided. The lock includes a main body, a lock switch, a lock controller, a lock communication circuit, and a battery. The battery is connected to the lock switch, the lock controller, and the lock communication circuit, and configured to supply electrical energy to the lock switch, the lock controller, and the lock communication circuit. The lock communication circuit is connected to the lock controller, and transmits a locking instruction or an unlocking instruction to the lock controller when receiving the locking instruction or the unlocking instruction from a second device located outside the lock. The lock controller is connected to the lock switch connected to the main body, and the lock controller controls, when receiving the locking instruction or the unlocking instruction, the main body to perform a locking operation or an unlocking operation through the lock switch.

Abstract: This application provides a method for issuing a digital certificate performed by a digital certificate issuing center that includes a public-private key generation module and an authentication module. The method includes: receiving a public-private key request from a node in a blockchain network; generating a public key and a private key of the node by using the public-private key generation module, and transmitting the public and private keys to the node; receiving the public key of the node and registration information of the node, and authenticating the registration information by using the authentication module; and generating, in accordance with a determination that the authentication succeeds, a digital certificate of the node by using the authentication module, and transmitting the digital certificate to the node. The embodiments of this application can improve the probative value of an issued digital certificate, thereby improving the security of data exchange in a blockchain network.

Abstract: The present invention discloses a high-safety power strip comprising a power strip body, having a plurality of three-hole and/or two-hole jacks for connecting with at least one plug; and a protective housing having an opening at one side thereof, the protective housing being connected with the power strip body, the jacks are located in the protective housing and face an inner wall of the protective housing. As the power strip of the invention comprises a protective housing, and the protective housing is covered outside the power strip body to prevent water or other liquid from splashing into the jacks of the power strip body, thus avoiding water or other liquid entering into the interior of the power strip body through the jacks. Therefore, the power strip of the invention has relatively high safety.

Abstract: The present invention discloses a power strip with two ends safely pluggable, used for connecting with a plug, the power strip is provided with two receiving spaces respectively arranged at two ends of the power strip for allowing the plug to plug in, the receiving space is provided with pins and a blocking structure, the blocking structure is configured for, when the plug is plugged into one of the receiving spaces, closing or obstructing the other receiving space.

Abstract: The present invention discloses a high-safety power strip comprising a power strip body, having a plurality of three-hole and/or two-hole jacks for connecting with at least one plug; and a protective housing having an opening at one side thereof, the protective housing being connected with the power strip body, the jacks are located in the protective housing and face an inner wall of the protective housing. As the power strip of the invention comprises a protective housing, and the protective housing is covered outside the power strip body to prevent water or other liquid from splashing into the jacks of the power strip body, thus avoiding water or other liquid entering into the interior of the power strip body through the jacks. Therefore, the power strip of the invention has relatively high safety.

Abstract: The present invention discloses a power strip with two ends safely pluggable, used for connecting with a plug, the power strip is provided with two receiving spaces respectively arranged at two ends of the power strip for allowing the plug to plug in, the receiving space is provided with pins and a blocking structure, the blocking structure is configured for, when the plug is plugged into one of the receiving spaces, closing or obstructing the other receiving space.