Computer-implemented methods, non-transitory, computer-readable media, and computer-implemented systems are provided for deploying a smart contract in a blockchain network. The computer-implemented method includes: receiving, by a blockchain node in a blockchain network, a transaction for creating a smart contract, wherein the transaction comprises a machine code of the smart contract, and the machine code of the smart contract is obtained by an Ahead of Time (AoT) compilation of a bytecode of the smart contract; determining, by the blockchain node, that an initiator account of the transaction is a predefined trusted account; and in response to determining that the initiator account of the transaction is the predefined trusted account, completing, by the blockchain node, a deployment of the smart contract.

The invention relates to an enabling card as well as a system and method for completing a financial transaction in a P.O.S. terminal comprising: a processor carried by the enabling card for: establishing a connection with a mobile device; receiving secure information from a mobile device and generating a digital signal; a coil carried by the enabling card for generating a magnetic field in response to the digital signal to simulate the swipe of card in the P.O.S. terminal and complete the financial transaction.

Techniques for providing a digital certificate management for blockchain technologies are described. One example method includes a transaction request including a digital certificate is received from a certificate authority at a node in a blockchain network, and the transaction request is a request to write the digital certificate into a blockchain associated with the blockchain network, and the digital certificate is issued to a node in the blockchain network. A consensus verification result is determined for the transaction request, and the consensus verification result is produced by nodes in the blockchain network. The consensus verification result is compared to a predetermined threshold value. In response to determining the consensus verification result is greater than or equal to the predetermined threshold value, the digital certificate is stored in the blockchain associated with the blockchain network.

A process for combining domain restriction and remote authentication may include receiving a token from a plug-in application to conduct a transaction associated with a user of a communicating device. The process may include sending an authentication request to a remote access control sever to authenticate the user, and receiving, from the remote access control server, an authentication tracking value that the remote access control server used in generation of an authentication cryptogram. The process may also include generating, using the authentication tracking value, a domain restriction cryptogram that is used for domain restriction of the token, and sending, to the plug-in application, the domain restriction cryptogram.

Described herein are systems and methods in which more secure methods are provided for a connected device to conduct transactions. In accordance with embodiments of the disclosure, a transaction code is generated and provided to the connected device. The transaction code may be stored in association with the information for the transaction such that when the transaction code is received at a transaction processing server, the transaction processing server is configured to generate an authorization request that includes the transaction information. The authorization request may then be routed to an authorization server associated with an account maintained by the transaction processing server.

A method of operating an electronic device capable of operating a plurality of execution environments including a first execution environment and a second execution environment is provided. The method includes generating a first authentication value, using a first application executed in the first execution environment, transmitting the first authentication value from the first application through the second execution environment to a second application executed in the first execution environment, transmitting, based on reception of the first authentication value, a second authentication value and a result of authentication of the user from the second application to the first application through the second execution environment, and performing, when the second authentication value corresponds to the first authentication value, payment based on the result of the authentication, using the first application.

An electronic device is provided. The electronic device includes a display and a processor. The processor transmits registration information relating to a user's payment means to an external electronic device, receives state information on the payment means, which is generated by the external electronic device using the registration information, from the external electronic device, and displays an indication corresponding to the state information in relation to an object for representing the payment means, through the display.

A secure token defines use-based access restrictions to a first user resource. The secure token is delegated to a second user. The second user redeems the secure token for access to the first user's resource. The access during redemption is constrained by the use-based access restrictions defined by the first user.

Implementations of the present application provide methods and devices for linking to an account and providing service processing. In one example method, an uncertified server can receive a linking request sent by a terminal device, wherein the linking request corresponds to a user account logged in by a user to the uncertified server. The uncertified service can transmit, to the terminal device, a predetermined instruction based on the linking request, wherein the predetermined instruction instructs the terminal device to send a real service account request to a certified server based on predetermined instruction. The uncertified server can later receive, from the terminal device, a virtual service account identifier generated by the certified server in response to the real service account request sent by the terminal device to the certified server. The virtual service account identifier can then be linked to the user account and used at a later time to transmit service requests along with the virtual service account identifier without sharing the real service account information.

Implementations of the present application provide methods and devices for linking to an account and providing service processing. In one example method, an uncertified server can receive a linking request sent by a terminal device, wherein the linking request corresponds to a user account logged in by a user to the uncertified server. The uncertified service can transmit, to the terminal device, a predetermined instruction based on the linking request, wherein the predetermined instruction instructs the terminal device to send a real service account request to a certified server based on predetermined instruction. The uncertified server can later receive, from the terminal device, a virtual service account identifier generated by the certified server in response to the real service account request sent by the terminal device to the certified server. The virtual service account identifier can then be linked to the user account and used at a later time to transmit service requests along with the virtual service account identifier without sharing the real service account information.