Abstract: Examples in this application disclose information sharing methods, media, and systems. One example computer-implemented method includes receiving, by a trusted execution environment (TEE), a first sharing request from a first institution and a second sharing request from a second institution, where the first sharing request comprises a user identity of a first user and first anti-money laundering (AML) risk information and the second sharing request comprises a user identity of a second user and second AML risk information, comparing the user identity of the first user with the user identity of the second user, in response to that the user identity of the first user is the same as the user identity of the second user, combining the first AML risk information and the second AML risk information, and sending the combined first AML risk information and second AML risk information to the first institution and the second institution.

Abstract: This application provides a vehicle DC voltage conversion circuit, including a high voltage battery connected in sequence, a primary-side-bridge module, a resonant module, a transformer module and a secondary-side-output module, wherein the secondary-side-output module includes a first voltage unit outputting a first voltage and a second voltage unit outputting a second voltage. The secondary side winding of the transformer is connected with the first voltage unit and the second voltage unit; The circuit also includes a driver module connected with the original side bridge module. The vehicle DC voltage conversion circuit provided in this application can not only output the first voltage, but also output the second voltage at the same time. It has the advantages of small size, high efficiency, low cost and industrialization, and can be widely used in the vehicle 48 V electrical load, such as 48 V vehicle electric heating system, 48 V vehicle cooling fan, and so on.

Abstract: The invention provides a three-way catalytic converter preheating control method and system, a vehicle and a storage medium. The includes when the temperature of an exhaust pipe of the hybrid electric vehicle is lower than a first temperature threshold value, sending a first work instruction; the high-low pressure conversion module outputting a first working voltage according to the first working instruction so as to start preheating of a catalyst in a three-way catalytic converter; when working data of the hybrid electric vehicle meets the switching condition, sending a second working instruction to make the high-low voltage conversion module outputs a second working voltage and stops outputting the first working voltage so as to stop the electric heating. According to the invention, two working modes can be provided, and the power battery can be used for electrically heating the catalyst in advance through the high-low pressure conversion module.

Abstract: Embodiments of the present specification disclose methods, apparatuses, and devices for transferring data assets based on a blockchain. One method includes: obtaining usage demand information of a data requestor for using original data, wherein the usage demand information indicates a demand of the data requestor for performing computations based on the original data; sending a usage authorization request for the original data to a data owner of the original data based on a decentralized identifier (DID) corresponding to the original data; receiving confirmation information of the usage authorization request from the data owner; processing the original data based on the usage demand information to obtain a processing result; transmitting the processing result to the data requestor; and generating a verifiable claim (VC) for recording usage information of the original data.

Abstract: Embodiments of the present specification disclose matching methods, apparatuses, and devices based on trusted asset data. One method comprises: analyzing trusted asset data of a first entity to obtain asset description information of the first entity, wherein the trusted asset data is stored on a trusted device; obtaining service information of a plurality of second entities; determining target service information that matches the first entity based on the asset description information and the service information; and sending the target service information to the first entity.

Abstract: Embodiments of the present specification disclose identity registration methods, apparatuses, and devices. One method comprising: identifying description information from a user for a secure application configured to obtain trusted data to be installed; retrieving installation package data corresponding to the secure application based on the description information; installing the secure application in a trusted execution environment (TEE) based on the installation package data; and adding the description information to a digital identity document of the user recorded on a blockchain.

Abstract: Embodiments of the present specification disclose data processing methods, apparatuses, devices, and media. One method includes the following: receiving a data use request; determining data to be used based on the data use request; determining one or more approvers of the data to be used; sending an approval instruction to the one or more approvers, wherein the approval instruction instructs the one or more approvers to approve the data use request; receiving feedback data from the one or more approvers; and determining that the data use request is approved if the feedback data satisfies a predetermined condition.

Abstract: The present application provides blockchain-based anti-counterfeiting methods, apparatuses, and systems. One method includes: obtaining an anti-counterfeiting verification request submitted by a user for a product; initiating anti-counterfeiting verification of the product in response to the anti-counterfeiting verification request, wherein the anti-counterfeiting verification comprises integrity verification of anti-counterfeiting information generated by a plurality of anti-counterfeiting participants on a blockchain, wherein the anti-counterfeiting information comprises a plurality of types of anti-counterfeiting identification information corresponding to the product; and returning an anti-counterfeiting verification result for the product to the user.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based cross-entity authentication are provided. One of the methods includes: obtaining an authentication request by a first entity for authenticating a user, wherein the authentication request comprises a decentralized identifier (DID) of the user; in response to determining that the first entity is permitted to access authentication information of the user endorsed by a second entity, generating a blockchain transaction for obtaining an authentication result of the user by the second entity, wherein the authentication result is associated with the DID; and transmitting the blockchain transaction to a blockchain node for adding to a blockchain.

Abstract: Examples in this application disclose information sharing computer-implemented methods, media, and systems. One example computer-implemented method includes obtaining, from an external server at a trusted execution environment (TEE), a trigger instruction, in response to obtaining the trigger instruction, combining, at the TEE, first anti-money laundering (AML) risk information provided by a first institution and second AML risk information provided by a second institution to obtain third AML risk information, where the first AML risk information and the second AML risk information correspond to a user identifier, and sending, from the TEE to the first institution, the third AML risk information.

Abstract: Embodiments of the present specification disclose data processing methods, apparatuses, and devices. A method can include: obtaining data use authorization information sent by a data requester; verifying the data use authorization information; in response to successfully verifying the data use authorization information, sending data authorized to be accessed by the data use authorization information to the data requester, wherein the data is obtained from a trusted institution and is stored in trusted hardware; and storing, on a blockchain associated with a blockchain network, a data sending record for the data.

Abstract: Embodiments of the present specification disclose data processing methods, apparatuses, and devices. One method comprises: obtaining an acquisition request for target data of a data owner; determining a trusted application (TAPP) for generating the target data based on decentralized identifier document (DID Doc) information of the data owner in response to the acquisition request; sending, to the TAPP, a target data generation request to use the TAPP to process data of the data owner obtained from a trusted institution; and receiving a processing result from the TAPP in response to the target data generation request.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for blockchain-based data synchronization, are provided. One of the methods includes: obtaining, from one or more blockchain nodes associated with a blockchain, data associated with a plurality of blockchain transactions recorded in one or more blocks of the blockchain; storing the obtained data in one or more data stores, wherein the storing comprises organizing the obtained data according to one or more schemas, at least one of the one or more schemas being different from a data structure of the blockchain; receiving, from a client device, a data query based on one of the one or more schemas; executing the data query on the data in the one or more data stores to obtain a result; and sending, to the client device, a response comprising the obtained result.

Abstract: Blockchain-based service data encryption methods and apparatuses are provided wherein by a first derived key is obtained by a node device of a key receiver, the first derived key distributed by a node device of a key distributor, wherein the first derived key is derived from a derived key of the key distributor based on a service data permission type of the key receiver and service data is encrypted based on the first derived key to obtain encrypted service data. The encrypted service data is sent to a blockchain, so that the encrypted service data is recorded in a distributed database of the blockchain after the blockchain performs consensus verification on the encrypted service. Because the derived key of the key distributor can decrypt the service data encrypted by the first derived key, the key distributor can decrypt, monitor, and manage service data uploaded by the key receiver.

Abstract: Embodiments of the present specification disclose trusted hardware-based identity management methods, apparatuses, and devices. One method comprising: determining personal identity information of a user of a trusted hardware; determining hardware identifier information of the trusted hardware; generating a decentralized identifier (DID) binding request based on the personal identity information and the hardware identifier information, wherein the DID binding request is configured to request to establish a corresponding relationship between a DID of the user and the trusted hardware; and sending the DID binding request to a decentralized identity service (DIS).

Abstract: Disclosed herein are methods, systems, and media for backtracking a user's operation of services. One method comprises: receiving an authorization request from a service device, the authorization request based on a service processing request from a client device, and comprises: data corresponding to a user's operation related to a service, authorization information for accessing the data granted to the service device; a first digital identity of the user; and a second digital identity of the service device; in response to determining that the authorization information satisfies a condition, generating a claim based on the data, the authorization information, the first digital identity, and the second digital identity; recording the claim to a blockchain; and in response to determining that a supervising user has permission to access the claim, granting permission to the supervising user to backtrack the user's operation corresponding to the service based on the claim in the blockchain.

Abstract: Embodiments of the present specification disclose trusted data transmission methods, apparatuses, and devices. One method comprising: identifying a data use request of a data requestor; identifying authorization information of a data owner; generating a data use authorization claim based on the authorization information, wherein the data use authorization claim indicates that the data owner authorizes the data requestor to use data; obtaining initial data based on the data use authorization claim; verifying the initial data to obtain target data that is successfully verified, wherein the target data comprises a data validity claim indicating a validity of the target data; and sending the target data to the data requestor.

Abstract: Embodiments of the present specification disclose data authorization information acquisition methods, apparatuses, and devices. One method comprises: receiving, from a data requestor and for data, a data use permission application; determining, based on the data use permission application, an approver, wherein the approver is an owner of the data; sending the data use permission application to the approver; receiving acknowledgement information of the approver for receiving the data use permission application; generating data authorization information based on the acknowledgement information; and sending the data authorization information to the data requestor.

Abstract: Embodiments of the present specification disclose data acquisition methods, apparatuses, and devices related to blockchain technologies. One method comprising: publishing, as a published description, a description of target data stored in a trusted device of a data owner; in response to the published description, receiving a data acquisition request from a data requestor for the target data wherein the data acquisition request is configured to retrieve the target data from a first resource; sending the data acquisition request to the data owner; receiving first confirmation information from the data owner; identifying the target data from the trusted device based on the first confirmation information; and sending the target data to the data requestor.

Abstract: A blockchain data processing method includes: receiving a read request for target data stored in a blockchain; acquiring read permission index information of the target data from the blockchain, and acquiring a data read rule corresponding to the target data based on the read permission index information, the data read rule being configured to determine readable content in the target data; determining, in a predetermined trusted environment, the readable content in the target data based on the data read rule; and providing the readable content in the target data for a sender of the read request.