公开(公告)号：US12273440B2

公开(公告)日：2025-04-08

申请号：US17760497

申请日：2021-01-12

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Yuzhuang Xu ,  Tao Zhu ,  Yu Zhou

IPC: H04L29/06 ,  H04L9/06 ,  H04L9/32 ,  H04L9/00

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.

公开(公告)号：US10903982B2

公开(公告)日：2021-01-26

申请号：US16770897

申请日：2018-12-10

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Yuzhuang Xu ,  Yu Zhou ,  Tao Zhu ,  Xiang Yao

IPC: H04L29/06 ,  H04L9/06 ,  H04L9/08 ,  H04L9/32 ,  G06K9/62

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.

公开(公告)号：US12238230B2

公开(公告)日：2025-02-25

申请号：US18575811

申请日：2022-08-04

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Yan Huang ,  Qinglin Hu ,  Yu Zhou ,  Weihuai Liu ,  Jingxiu Hu ,  Xu Le ,  Yuzhuang Xu ,  Hehe Wang ,  Zhaoye Xu

IPC: H04L9/00 ,  H04L9/06

Abstract: A blockchain consensus method includes: on the basis of transaction data and a verifiable delay function, a node generating a target block, or synchronously acquiring a target block from other nodes; determining, from among multiple sub-blockchains, a target sub-blockchain based on information of a target block, and adding the target block to the target sub-blockchain; then, acquiring respective corresponding effective block sequences from the multiple sub-blockchains; performing global sorting on effective blocks on the basis of logic clocks respectively corresponding to acquired effective blocks, and acquiring a global blockchain. A global blockchain is acquired by using a means of multi-chain consensus, thereby improving the expandability and transaction throughput of a blockchain system in a large-scale open network environment. Acquiring a global blockchain by performing global sorting on effective blocks on the basis of logic clocks corresponding to the effective blocks can better improve the security of a multi-chain system.

公开(公告)号：US11687921B2

公开(公告)日：2023-06-27

申请号：US17595767

申请日：2020-09-23

Applicant: CHINA UNIONPAY CO., LTD.

Inventor： Hehe Wang ,  Yuzhuang Xu ,  Tao Zhu ,  Yu Zhou

IPC: G06Q20/38 ,  G06Q20/40 ,  H04L9/32

CPC classification number: G06Q20/3827 ,  G06Q20/38215 ,  G06Q20/407 ,  G06Q20/4014 ,  H04L9/3297

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.