Method for safely performing transaction using mobile user terminal, involves transmitting transaction number to user terminal, assigning user terminal to transaction by cash box, and carrying out transaction by account settlement system

摘要

The method involves establishing a communication link between a user terminal (2) and an account settlement system (9), and transmitting a transaction number generated by the account settlement system to the user terminal through the communication link. An assignment of the user terminal to a transaction takes place by the cash box (5) at the time of encashing based on a transaction number transmitted to the cash box. The transaction is carried out by the account settlement system or a payment service, and a success of the transaction is signaled to the cash box with an acknowledgment message. An independent claim is included for a system for carrying out a safe transaction.