Abstract: Provided are a blockchain-based one ID service system and method, in an authentication method according to the embodiment of present invention, an authentication support server maps and registers a first ID issued by a first SP server to a first user and a first site of the first SP server, which is an issuing server, and, upon receiving the first ID from a second SP server, the authentication support server returns information on the first site mapped to the first ID to the second SP server. To this end, there is no need for a separate server configuration to perform an authentication procedure, and it is possible to lessen the burden of performing authentication for SPs.

Abstract: Provided are a blockchain-based one ID service system and method, in an authentication method according to the embodiment of present invention, an authentication support server maps and registers a first ID issued by a first SP server to a first user and a first site of the first SP server, which is an issuing server, and, upon receiving the first ID from a second SP server, the authentication support server returns information on the first site mapped to the first ID to the second SP server. To this end, there is no need for a separate server configuration to perform an authentication procedure, and it is possible to lessen the burden of performing authentication for SPs.

Abstract: A method for managing a secure element (SE) is disclosed. The method for managing the SE includes identifying secure information stored in the SE, sending a command to request to set suspension of use of a means of payment included in the secure information stored in the SE to a secure server, generating backup data using at least part of the identified secure information, transmitting the backup data from the SE to the secure server through a secure channel set between the secure server and the SE and storing the backup data, transmitting a restoration command on the secure information to the secure server, and restoring the backup data of the secure server to the SE or another SE.

Abstract: A method and system for safely backing up secure information of an SE in a terminal to a secure server, and then safely restoring the backed-up secure information to the SE of the terminal or another terminal is provided. The method for managing the SE includes: identifying secure information; generating backup data; transmitting the backup data to a secure server; and restoring the backup data to the SE or another SE. The identifying the secure information includes, in response to a backup command on the secure information of the SE, identifying the secure information stored in the SE. The generating the backup data includes generating backup data using at least part of the identified secure information. The transmitting the backup data to the secure server include setting a secure channel between the secure server and the SE, and transmitting the backup data from the SE to the secure server through the secure channel and storing the backup data.