Advanced New Technologies Co., Ltd.

Alipay (hangzhou) Information Technology Co., Ltd.

Alipay Information Technology Co., Ltd.

Yujun Peng

Ying Yan

Changzheng Wei

Hui Zhang

Wenlong Yang

Erfeng Yan

Wenhui Liu

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for providing blockchain-based data authorization. One of the methods includes receiving, by a blockchain node, a data acquisition transaction submitted by a data user for obtaining target data possessed by a data owner, determining, by the blockchain node, that the data user has obtained authorization of the target data, and executing, by the blockchain node, a smart contract invoked by the data acquisition transaction to issue an authorization token to the data user in response to determining that the data user has authorization of the target data, where the authorization token is sent to a privacy computing platform.

Providing data authorization based on blockchain

Embodiments of the present specification provide methods, apparatuses, devices, and systems for asset transfer. The method includes the following: a blockchain node receives an asset transfer request sent by a first client device; invoking a first smart contract in a blockchain, and locking a to-be-transferred asset based on the first smart contract and asset transfer information included in the asset transfer request; sending asset information of the to-be-transferred asset to a designated trading platform, so that the trading platform determines, based on the asset information, a second user who trades with a first user; obtaining asset transfer confirmation information from the first client device, and performing transfer processing on the locked to-be-transferred asset based on the asset transfer confirmation information, so as to transfer the to-be-transferred asset to the second user, where the asset transfer confirmation information includes information about the second user.

Methods, apparatuses, devices, and systems for asset transfer

A method for generating a blockchain warehouse receipt includes: obtaining item registration information provided by a first user; generating a blockchain warehouse receipt including basic type fields according to the item registration information by invoking a first smart contract, the basic type fields including a warehouse receipt type field, a warehouse receipt ID field, a generation time field, a state field, a category field, a property owner field, a quantity field, and a weight field; and storing the blockchain warehouse receipt in a blockchain network.

Method, apparatus, and device for generating and updating blockchain warehouse receipt

One or more implementations of the present specification provide a blockchain-based data authorization method and apparatus. The method can include receiving, by a blockchain node, an authentication transaction submitted by a privacy computing platform, where the authentication transaction queries whether a data user has obtained authorization of target data possessed by a data owner, and in response to determining that the data user has obtained authorization of the target data, executing, by the blockchain node, a smart contract invoked by the authentication transaction to provide an authorization token to the privacy computing platform that instructs the privacy computing platform to obtain the target data, and send a computational result of one or more predetermined computational operations based on the target data to the data user.

Blockchain-based data authorization method and apparatus

Disclosed herein are methods, systems, and apparatus for controlling authorization of access to user data. One of the methods includes generating a first decentralized identifier based on information about a second decentralized identifier and information about a third decentralized identifier; registering a first set of records and the first decentralized identifier at a second blockchain, the second blockchain includes one or more blockchain contracts configured to, upon execution, perform one or more operations associated with the first decentralized identifier, and registering the first set of records includes storing a hash value for each record in the first set of records in the second blockchain; and controlling authorization of access to the first set of records based on the first decentralized identifier, including in response to receiving a request to grant a second user access to a particular record in the first set of records, determining whether the request includes the first decentralized identifier.

Data authorization based on decentralized identifiers

Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based consensus management, are provided. One of the methods includes: obtaining a request for creating a consensus template, wherein the request comprises information about a plurality of participating entities associated with the consensus template; generating, based on the request, a dataset representing a hierarchical structure of the participating entities associated with the consensus template; creating a blockchain transaction for registering the consensus template to a blockchain, wherein the blockchain transaction comprises the dataset representing the hierarchical structure of the participating entities; and sending, to one or more blockchain nodes associated with the blockchain for adding to the blockchain, the blockchain transaction for registering the consensus template to the blockchain.

System and method for consensus management

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for controlling authorization of access to user data. One of the methods includes receiving a first request that includes a first digital activity decentralized identifier (DID) and a first hash value of first digital activity data; storing the first digital activity decentralized identifier and the first hash value in a first record in a decentralized identifier blockchain that is configured to store records associated with a plurality of decentralized identifiers of a plurality of users; and controlling authorization of access to the first digital activity data stored in the first consortium blockchain using information stored in the first record in the decentralized identifier blockchain, including determining whether to authorize another user access to the first digital activity data based on the information stored in the first record in the decentralized identifier blockchain.

Disclosed herein are methods, systems, and apparatus for blockchain-based consensus process having enhanced security. One of the methods includes executing a first smart contract on a first blockchain. Executing the consensus smart contract includes executing code for implementing a consensus process for determining consensus among two or more consensus nodes according to a set of one or more consensus rules. A private key of the consensus smart contract corresponding to the public key is stored in a key management system associated with the second blockchain. The consensus smart contract uses the private key to digitally sign a message requesting a vote, and sends the digitally signed message to the two or more consensus nodes. The public key of the consensus smart contract enables the consensus nodes to validate the message sent from the consensus smart contract. A result of execution of the consensus smart contract are recorded in the first or second blockchain.

Blockchain-based consensus process

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for providing blockchain-based data authorization. One of the methods includes receiving, by a blockchain node, a data acquisition transaction submitted by a data user for obtaining target data possessed by a data owner, determining, by the blockchain node, that the data user has obtained authorization of the target data, and executing, by the blockchain node, a smart contract invoked by the data acquisition transaction to provide one or more of the target data and a computational result of one or more predetermined computational operations performed based on the target data to the data user.

A method for starting an operation process comprises: receiving an operation request message from a terminal device in response to the terminal device scanning a barcode to obtain barcode information and determining an address of the server based on the barcode information, the operation request comprising an image of text associated with the barcode scanned by the terminal device, and the image of text specifying an operation function; determining text content based on the image of text; searching a correspondence relationship between different text content and respective operation access information to obtain operation access information corresponding to the determined text content; and returning the operation access information to the terminal device, for the terminal device to start an operation process by using the operation access information, the operation process having the operation function specified by the received image of text.

Growing community of inventors

Hangzhou, China

Yujun Peng