Abstract: The present disclosure provides a method, a device, a storage medium and a program product for carbon trading.

Abstract: A blockchain-based workflow node certification method and device. The method includes: a certification party establishing a general workflow template. the general workflow template including a plurality of workflow nodes cach having an audit attribute for indicating whether the workflow node needs to be certified: the certification party establishing a general data template based on the general workflow template: instantiating the general data template and the general workflow template: and acquiring a current workflow node in the instantiated general workflow template. determining. based on the audit attribute, whether the current workflow node needs to be certified. if yes. performing certification by a centralized certification party. and depositing certification by a blockchain. Users can create and modify transaction processes as needed to meet the needs of changeable transaction. By combining central certification with blockchain certification deposition.

Abstract: A computer-implemented method and device for implementing identity endorsement on a blockchain are provided. In some embodiments the method includes that: a user submits, as an applicant, certification information to a third-party certification authority, the third-party certification authority reviews and generates a certification statement, and the third-party certification authority deposits deposit information of the certification statement on the blockchain, and returns the certification statement including the deposition information to the user; an information requester requests for the certification statement from the user, and the user decrypts the certification statement and then sends the certification statement to the information requester; and the information requester checks in the blockchain, verifies validity of the certification statement and qualification of the third-party certification authority, and completes user identity certification after confirmation.

Abstract: Methods, apparatuses, devices, and systems for facilitating enterprise-to-enterprise financial transactions in a supply chain. In an example, the method includes: receiving, by a management server, a virtual currency transfer request from a first device, wherein the virtual currency transfer request includes a first amount of a to-be-transferred virtual currency and an identifier of a second device; and transferring, by the management server in response to the virtual currency transfer request, the virtual currency of the first amount belonging to the first device to the second device corresponding to the identifier of the second device. The transferred virtual currency may be used to be exchanged for a legal currency. In this example delivery is performed based on a virtual currency, and when an enterprise in the supply chain needs to obtain funds, a virtual currency belonging to that enterprise can be exchanged for a legal currency at any time.

Abstract: The present disclosure provides methods and devices for key management. In one example, a method of key management comprises: obtaining, at a user device, a number of users in a group of users and a minimum number of users for restoring a transaction key; randomly generating the transaction key; splitting the transaction key into a plurality of sub-keys, the number of sub-keys being the same as the number of users; and sending the plurality of sub-keys to a management device, each of the plurality of sub-keys being encrypted with a public key of a user corresponding to a sub-key.

Abstract: A method, an apparatus, and a device for auditing data based on a blockchain, and a storage medium. The method includes: receiving, from a requester, an audit request including a type of the requester; determining an item to be audited, according to the type of the requester; generating an item for display, according to the item to be audited and an item for distraction; receiving first original data, which is inputted by the requester based on the item for display; generating a first audit result according to target data and an audit template, where the target data is in the first original data and corresponds to the item to be audited, and the audit template is generated based on the item to be audited and includes referential data for the item to be audited; and uploading the first original data and the first audit result to the blockchain.

Abstract: A method and an apparatus for processing data, a storage medium, and a device. When processing data of a product, production data that is of the product and within an enterprise is acquired, circulation data that is of the product and among enterprises is acquired, and then the acquired production data is correlated with the acquired circulation data based on data authorization and data reference, so as to obtain a chain of data relationship. Thereby, the data relationship is protected from being forged or tampered, and data query and data tracing are facilitated, which improves data security. In addition, data collaboration within the enterprise and among the enterprises can be effectively implemented. Further, visualization based on the data collaboration is capable to help recall the product accurately and efficiently.

Abstract: Embodiments of the present disclosure relate to methods, devices, a computer readable storage medium and a computer program product for processing or managing a blockchain transaction. In a method for processing a blockchain transaction, a blockchain node of a blockchain for processing the blockchain transaction receives a transaction request, the transaction request indicating at least a initiator of the transaction, transaction content and a transaction recipient of the transaction. The blockchain node computes, based on the transaction content, a transaction fee for processing the transaction. The blockchain node determines whether the initiator of the transaction is a sponsored user of the transaction recipient, and determines a payment account from which the transaction fee is deducted in response to determining that the initiator of the transaction is a sponsored user of the transaction recipient.

Abstract: Embodiments of the present disclosure relate to a method, a device, a computer readable storage medium and a computer program product for transaction processing on a blockchain. In the method, the blockchain node for processing a transaction receives a transaction request including a plurality of fields, the plurality of fields including a transaction task field including a plurality of clauses and each clause of the plurality of clauses indicating one of a plurality of tasks of the transaction. The blockchain node processes the plurality of tasks and determines that the transaction is successfully processed only in response to successfully processing all the plurality of tasks. The transaction processing as provided in the present disclosure enables multiple tasks to be processed through a single transaction procedure on the blockchain in an efficient way.

Abstract: The present disclosure includes IoT devices, block chain platforms, and IoT systems for recording transportation data of an object and methods of using the same. In some examples, IoT devices are one time programmed with a private key in a manufacturing process of the IoT device. In some examples, IoT devices may include at least one sensor configured to detect external environment data of an object during transportation of the object; and a processor configured to receive the data from the sensor and generate a data packet based on the data using a private key, the data packet including a unique identification number of the IoT device, the data and a signature generated according to the unique identification number and the data.

Abstract: A method is disclosed for implementing trust Internet of Things (IoT) services in an IoT device and a user device. The IoT device receives from the user device an authentication request comprising a hash value, first encrypted information and second encrypted information, where the IoT device determines whether the user device is successfully authenticated based on determining the user device public key and confirming that the user device public key exists in a list of access permitted user devices of the IoT device.

Abstract: The present disclosure discloses methods, systems, an electronic device, and a storage medium for confirming a property right and for transferring a property right. The present disclosure realizes the confirmation and transfer of the ownership of a property and traceback of the ownership of the property, making the process of right confirmation and implementation is more efficient and secure, and improving the user experience.

Abstract: A method, a system, an electronic device, and a storage medium for storing and collecting temperature data are disclosed. The storage method includes: acquiring starting time data corresponding to a temperature recording time period and acquiring actual temperature data corresponding to each time stamp; obtaining at least one piece of target compressed data corresponding to the temperature recording time period by compressing the actual temperature data; and storing the starting time data and the target compressed data corresponding to the temperature recording time period into a storage space of a temperature recorder.

Abstract: Methods for splitting and recovering a key, a storage medium, a computer program product, and a key management system (170), wherein the key management system (170) comprises a management device (110) used for managing user equipment of users in a user group and a hardware security module (160) connected to the management device (110).

Abstract: The present application discloses a key security management system and a key security management method, a computer-readable storage medium, and a computer program. The key security management system includes a security host and a hardware security device. The security host is configured to receive a first operation request, verify the first operation request, and generate a second operation request based on the first operation request when the verification is passed, wherein the first operation request and the second operation request both include an identification.

Abstract: The present disclosure provides methods and devices for key management. In one example, a method of key management comprises: obtaining, at a user device, a number of users in a group of users and a minimum number of users for restoring a transaction key; randomly generating the transaction key; splitting the transaction key into a plurality of sub-keys, the number of sub-keys being the same as the number of users; and sending the plurality of sub-keys to a management device, each of the plurality of sub-keys being encrypted with a public key of a user corresponding to a sub-key.

Abstract: The present disclosure includes IoT devices, block chain platforms, and IoT systems for recording transportation data of an object and methods of using the same. In some examples, IoT devices are one time programmed with a private key in a manufacturing process of the IoT device. In some examples, IoT devices may include at least one sensor configured to detect external environment data of an object during transportation of the object; and a processor configured to receive the data from the sensor and generate a data packet based on the data using a private key, the data packet including a unique identification number of the IoT device, the data and a signature generated according to the unique identification number and the data.

Abstract: Implementations of the subject matter described herein provide a method of managing user identity authentication data, a method of authorizing a query, a management device, an authentication device, a terminal, a non-transitory computer readable storage medium and a computer program product.

Abstract: The present disclosure provides a method, a device, a storage medium and a program product for carbon trading.

Abstract: The present disclosure includes IoT devices, block chain platforms, and IoT systems for recording transportation data of an object and methods of using the same. In some examples, IoT devices are one time programmed with a private key in a manufacturing process of the IoT device. In some examples, IoT devices may include at least one sensor configured to detect external environment data of an object during transportation of the object; and a processor configured to receive the data from the sensor and generate a data packet based on the data using a private key, the data packet including a unique identification number of the IoT device, the data and a signature generated according to the unique identification number and the data.