Abstract: A blockchain-based public parameter generation method against backdoor attacks, includes: acquiring the hash values of L latest confirmed blocks on a blockchain, and the hash values of the L blocks and a count variable for generation are mapped to an element in a set G via a specified mapping to obtain the generated public parameter; L??, ? is the minimum number to guarantee blockchains' chain quality property; checking whether the generated parameter meets the condition, if not, discarding the parameter and updating the generated public parameter; if the condition is met, outputting the public parameter to the device that uses the public parameter. In this disclosure, the public parameters are random, since they are based on the latest confirmed blocks on the blockchain and are guaranteed by the computational power of the blockchain; the generation of public parameters is publicly verifiable and random.

Abstract: Embodiments of the present application disclose a method and device for downloading and reconstructing game data, and relate to the technical field of Internet.

Abstract: A method and device for generating and uploading game data are disclosed, which relate to the technical field of Internet. The method for generating game data comprises: obtaining a scene template of a target game scene from a preset scene template database; obtaining a scene object of the target game scene from a preset scene object database; determining the location of the scene object; obtaining display effect of the scene object from a preset scene object display effect database, and displaying the scene object in the scene template of the target game scene; determining illumination effect of the scene object according to the determined location of the scene object and illumination parameters of a game engine, and rendering the scene object in the target game scene and generating the target game scene.

Abstract: Embodiments of the present application disclose a method and device for generating and uploading game data, and relate to the technical field of Internet. The method for generating game data comprises: obtaining a scene template of the target game scene from a preset scene template database; obtaining a scene object of the target game scene from a preset scene object database; determining the location of the scene object in the target game scene; obtaining display effect of the scene object in the target game scene from the preset scene object display effect database, and displaying, in the scene template of the target game scene, the scene object in the target game scene; determining illumination effect of the scene object in the target game scene according to the determined location of the scene object and illumination parameters of a game engine itself, and rendering the scene object in the target game scene and generating the target game scene.

Abstract: Embodiments of the present application disclose a method and device for downloading and reconstructing game data, and relate to the technical field of Internet.

Abstract: Provided is a digital angle measuring device, comprising an upper ruler having a first center hole, a lower ruler having a second center hole, a capacitive gate angle sensor, a display portion, a connecting base having a through hole, a rotary axis, a locking knob, and a stop screw, wherein the upper ruler and the lower ruler are connected to the rotary axis via the center holes, the display portion is connected to the rotary axis via the through hole, the locking knob is disposed on the connecting base and connected to the rotary axis, and the stop screw is disposed on one end of the rotary axis. The digital angle measuring device is easily installed and cost-effective.