Abstract: Provided are a transactions certification method and system to protect privacy on details of electronic transactions, the method comprising the operations of: a) receiving and registering client information which is encoded so that a client cannot be identified; b) receiving and storing transactions details of a client including a client transactions identifier encoded by the service provider server; c) after receiving client certification information for client certification, performing client certification by comparing the client information previously registered in the operation a) with the received client certification information; d) receiving a client transactions identifier for searching transactions details of a client when the client certification is performed in the operation c), and determining whether the client transactions identifier and the client transactions identifier previously stored in the operation b) are identical with each other; and c) generating a message corresponding to the transac

Abstract: Provided are a method and system for managing reliability of an identification (ID) management apparatus for user centric ID management. Provided are a method and system for managing reliability of an ID management apparatus, whereby an application service providing apparatus can determine whether to trust a corresponding ID management apparatus without having a pre-agreement with an ID management apparatus regardless of which ID management apparatus is selected by a user in user centric ID management circumstances. Therefore, reliability is determined according to types of information provided by the ID management apparatus, and reliability of the ID management apparatus can be determined according to a result of evaluation made by the application service providing apparatus instead of a particular single subject.

Abstract: A method and apparatus for generating a certificate including a guardian's agreement for a ward are provided. The apparatus includes a verification unit verifying a certificate of the guardian, an agreement setting unit setting an agreement on conditions on which the ward is allowed to use an online environment, and a certificate issuing unit generating a certificate including the agreement for the ward when the verification of the guardian's certificate succeeds.

Abstract: Provided is a certificate transmission server transmitting a certificate stored in a fixed terminal to a mobile terminal, a system including the same, and a method using the same. The method includes forming a security channel to the mobile terminal and performing authentication of the mobile terminal, forming a security channel to the fixed terminal and performing authentication of the fixed terminal, and if the authentication of the mobile terminal and the fixed terminal is successful, receiving the certificate from the fixed terminal and transmitting the certificate to the mobile terminal. Accordingly, authentication of a mobile terminal and a fixed terminal can be performed by a certificate transmission server, and the certificate can be transmitted by establishing a safe communication channel.