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公开(公告)号：US20220327531A1
公开(公告)日：2022-10-13
申请号：US17595767
申请日：2020-09-23
Applicant: CHINA UNIONPAY CO., LTD.
Inventor： Hehe WANG , Yuzhuang XU , Tao ZHU , Yu ZHOU
Abstract: The present disclosure provides a method and a device for control of blockchain data access based on a smart contract. The method includes obtaining, by a blockchain node, an access operation request of an institution, the access operation request including a transaction identifier of a transaction to be accessed, according to the transaction identifier, determining a blockchain state corresponding to the transaction identifier, the blockchain state including a hash value of the transaction corresponding to a last time change of the blockchain state, according to the hash value of the transaction corresponding to the last time change in the blockchain state and an identifier of the institution, performing data access control on the institution, obtaining control result, and transmitting the control result to the institution.
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公开(公告)号：US20200382278A1
公开(公告)日：2020-12-03
申请号：US16770897
申请日：2018-12-10
Applicant: CHINA UNIONPAY CO., LTD.
Inventor： Yuzhuang XU , Yu ZHOU , Tao ZHU , Xiang YAO
Abstract: The present disclosure relates to a smart contract-based data transfer method, comprising the steps of: a data source encrypting data to be transferred based on a first mechanism to form encrypted data, and sending the encrypted data to a smart contract terminal; the smart contract terminal decrypting the encrypted data based on a second mechanism corresponding to the first mechanism to form the decrypted data, and processing the decrypted data by using at least one logic unit to form the resulting data; and the smart contract terminal sending the resulting data to a data-related party; wherein the at least one logic unit executes an instruction set to implement a contract logic, and the instruction set is stored in a blockchain.
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公开(公告)号：US20200286076A1
公开(公告)日：2020-09-10
申请号：US16648643
申请日：2018-10-05
Applicant: CHINA UNIONPAY CO., LTD.
Inventor： Tao ZHU , Yaogang TONG , Yu ZHOU
Abstract: A method for verification and registration of digital currency transaction, including: authorizing, by a central node, one or more institutions to perform a transaction verification; after reception of a request for a transaction sent by a user and a pre-selected endorsement policy, parsing, by the central node, the request, generating a first data packet, and sending the first data packet to the one or more authorized institutions for the transaction verification; receiving a verification feedback result from an authorized institution of the one or more authorized institutions; and registering, by the central node, the transaction and informing the user that the transaction is successful, when the central node determines that the received verification feedback result meets a requirement of the endorsement policy. There is also provided a system and a computer storage medium for verification and registration of digital currency transaction.
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公开(公告)号：US20230125083A1
公开(公告)日：2023-04-27
申请号：US17760497
申请日：2021-01-12
Applicant: CHINA UNIONPAY CO., LTD.
Inventor： Yuzhuang XU , Tao ZHU , Yu ZHOU
Abstract: A method for authorizing a blockchain data access on a blockchain platform includes: obtaining from a third-party institution a data access request containing a user ID of data access, a data scope, and a random number of a signature, which is generated by the third-party institution after receiving a random number sent by a client terminal and signing on the received random number; performing a verification on the random number of the signature and the data scope; and after the verification is passed, sending data ciphertext corresponding to the user ID to the third-party institution, such that the third-party institution decrypts the data ciphertext using a data secret key sent by the client terminal.
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