66 results about "Oracle machine" patented technology

The invention discloses a fraud prevention system and method based on blockchain, and the system comprises a plurality of groups of participation mechanisms, wherein each participation mechanism comprises a blockchain node, an oracle machine node, an authority module, and a biological feature collection device, and the blockchain node and blockchain nodes of other participating mechanisms form a blockchain network; the oracle machine nodes obtain networking addresses of the oracle machine nodes of other participation structures through the block chain network, and establish an oracle machine network according to the networking addresses; consensus is performed on the biological characteristic information to an oracle machine network to carry out risk authentication voting, and a voting result is generated according to participation mechanisms voted by all oracle machine nodes; when the voting result is higher than a preset threshold value, alarm information is outputted; a biological characteristic collection device collects biological characteristic information of a user and uploading the biological characteristic information to the corresponding oracle machine node; and an authority module is connected with the oracle machine node and the biological characteristic acquisition equipment and is used for issuing the risk coefficient of the risk user through the oracle machine node according to the preset authority of the current participation mechanism.

The invention provides a blockchain data processing method and device, and electronic equipment. In a process of executing an intelligent contract related to a third party, an oracle machine only broadcasts an oracle machine public key and a random number public key, generates respective intelligent contracts of the two nodes according to a contract public key and a signature public key respectively sent by the first node and the second node, and sends an oracle machine signature public key obtained by the final change result to the first node and the second node. The judgment process of the specific event execution result is completed by the respective intelligent contracts of the first node and the second node, so that the interaction frequency of the oracle machine and the nodes can bereduced, the workload of the oracle machine is reduced, and the execution efficiency and safety of the oracle machine are improved.

The invention discloses a patent technology pledge financing method and system based on block chain, and a computer readable storage medium. The patent technology pledge financing method and system use a built-in algorithm of an oracle machine for judging the life cycle of the patent technology, accurately evaluate the patent technology life cycle value further, evaluation result reliability is high, an existing system storage and conveying structure is abandoned; a more credible operation mode is established through the block chain; all the information is circulated on the block chain network; the problem of inaccurate patent technical value evaluation caused by asymmetry, incompleteness and falseness of information is prevented; according to the method, the lending risk can be effectively controlled, due to the fact that the accuracy of the evaluation result is high, participation of a third-party guarantee institution is abandoned, the process is simplified, manual participation isnot needed in the whole process, and the problems that the patent pledge loan application process is slow and the cost is too high are solved.

The invention provides a cross-chain asset replacement scene-oriented oracle machine-based block chain interconnection method and device, and the method comprises the steps that an oracle machine main node monitors a cross-chain request event triggered by a source block chain, signs a cross-chain request threshold value to obtain a preparation request, and sends the preparation request to an oracle machine supervision / common node; each oracle supervision / common node performs threshold signature on the preparation request to obtain a to-be-aggregated request message, and sends the to-be-aggregated request message to other oracle supervision / common nodes; each oracle machine supervision / common node verifies the cross-chain request content, and when the total number of threshold signatures reaches a set number, the threshold signatures are aggregated; the oracle machine common node generates an aggregated message, and the oracle machine supervision node verifies the compliance of the cross-chain request content and generates the aggregated message; and the first node obtaining the aggregated signature sends an aggregated message to the target block chain, verifies a node consensus and executes a cross-chain transaction according to a result. Through the scheme, controllable and credible cross-chain transaction can be realized.