In some implementations, a transaction card may receive transaction data from a transaction terminal based on initiation of a transaction with the transaction terminal; generate a tokenized primary account number, for use with the transaction, based on the transaction data and an actual primary account number of the transaction card; and transmit the tokenized primary account number to the transaction terminal for processing the transaction.

The present disclosure provides a method, a device, a storage medium and a program product for carbon trading. The method for carbon trading includes acquiring identification data and carbon behavior data of a transport device, the carbon behavior data indicating at least one of carbon consumption behavior and carbon emission reduction behavior of the transport device and the identification data including at least an identity corresponding to the transport device; in response to determining that the identity is in a predetermined identity set, acquiring an attribute corresponding to the transport device based on the identity; and determining, based on the carbon behavior data and a first smart contract matching with the attribute, a carbon emission reduction equivalent corresponding to the carbon behavior data, the first smart contract being provided for converting the carbon behavior data to the carbon emission reduction equivalent; transmitting the carbon emission reduction equivalent to a blockchain platform to store in a first account associated with a first object, the first object being associated with a plurality of transport devices; and publishing carbon trading associated with the carbon emission reduction equivalent in the first account as a blockchain transaction.

Disclosed herein are methods, systems, and apparatus, including computer programs encoded on computer storage media, for electronic-certificate-based interaction. One of the methods includes that a client device outputs a list of users that have social relationships with the first user and that hold electronic certificates in response to an interaction operation initiated by a first user. The client device determines a second user selected by the first user from the list of users. An electronic certificate acquisition request is sent by the client device to a server. The client device receives an electronic certificate from the server and stores the electronic certificate in a local storage of the client device. The first user obtains an allocation permission of a virtual object in a predetermined virtual object set when a category quantity of obtained electronic certificates reaches a predetermined threshold.

Implementations of the present disclosure provide techniques to improve security in blockchain networks. In some implementations, a linking request is received from a node. The node requests to be linked to a blockchain network. The linking request includes a digital code. One or more consensus verification messages are received from one or more blockchain nodes of the blockchain network. Each consensus verification message indicates whether a respective blockchain node approves or denies the linking request. A consensus verification result is determined based on the one or more consensus verification messages. In response to determining that the linking request is approved by the one or more blockchain nodes, the digital code is stored into the blockchain network as a digital certificate of the node.

A system remotely accesses an Automated Teller Machine (ATM) machine by detecting insertion of a customer bank card into the ATM. The insertion of the customer bank card is detected by the ATM. The system initiates a connection to a mobile device upon the detection of the insertion. The system then unlocks the ATM when the mobile device accepts the connection, and unlocks the ATM when a banking transaction has been completed, where the banking transaction completed by a remote user operating the mobile device. The system automatically disconnects the connection to the mobile device, and automatically unlocks the ATM after a predetermined time period has elapsed. The system automatically ejects the customer bank card from the ATM when the ATM is automatically unlocked.

A blockchain-based rough gemstone planning method including receiving a gemstone record including gemstone scan information and a smart contract, receiving a plurality of virtual derivative gemstones that may be derived from a gemstone associated with the received gemstone record and a plurality of virtual derivative gemstone records comprising meta-information about the virtual derivative gemstones, recording the plurality of virtual derivative gemstone records to a meta-information database, generating a plurality of derivative smart contracts associated with the plurality of virtual derivative gemstone records, sending the virtual derivative gemstone records and the derivative smart contracts, receiving price information for the plurality of virtual derivative gemstone records, and identifying a subset of the plurality of virtual derivative gemstone records that may be derived from the gemstone associated with received gemstone record responsive to the received price information received.

Systems and methods are provided for authenticating users to payment accounts in connection with transactions. An exemplary method includes receiving, by at least one computing device, an authentication request for a transaction associated with a payment account where the authentication request includes a token associated with the payment account and a cryptogram, and mapping the token to a primary account number (PAN) for the payment account. The method also includes validating the cryptogram, generating a directory server nonce (DSN) for the authentication request, and transmitting the DSN and the account number to an access control server (ACS) associated with an issuer of the payment account. The method further includes, in response to an issuer authentication value (IAV), compiling an accountholder authentication value (AAV) including the IAV, the DSN and an amount of the transaction, and transmitting the AAV to one of a merchant and a server.

A computer method for secure transfer of a blockchain token representing an interest in a proprietary rights asset includes displaying at least summary information corresponding to a proprietary rights asset to a user on an electronic display according to a user interface. The computer method includes receiving, from the user via the user interface, an order to exchange a first quantity of cryptographic currency held by the user at a user wallet memory address for a second quantity of asset tokens representing at least a fractional interest in the proprietary rights asset, writing data corresponding to a pending transfer of the second quantity of asset tokens to the user wallet address, and receiving data corresponding to the first quantity of cryptographic currency into a transaction wallet memory address.

Systems, methods, platforms, and devices that generate, store, transact, transfer, exchange, and/or otherwise process digital tokens are described. In embodiments, systems, methods, platforms, and devices obtain an identifier for an item that includes a set of item attributes, generate a digital token including a set of digital attributes that correspond to the set of item attributes, and cryptographically link the digital token to one or more units of the item. The digital token may be transferred, exchanged, redeemed, or otherwise transacted, which provides both the flexibility and convenience of virtual item transactions and the reliability and value of physical item transactions.

A computer implemented method includes receiving, by a trusted execution environment (TEE) application, a cross-chain data request from a first blockchain node of a first blockchain; obtaining, by the TEE application, cross-chain data corresponding to the cross-chain data request from a second blockchain node of a second blockchain; verifying, by the TEE application, the cross-chain data; generating, by the TEE application, a signature using a private key of the TEE application, where a public key corresponding to the private key is stored in the first blockchain; and returning, by the TEE application, the cross-chain data and the signature to the first blockchain node.