Lg Cns Co., Ltd.

Taehoon Ahn

A method for implementing non-repudiation of payment in a payment managing server includes receiving, from a user terminal, a terminal public key of a pair of asymmetric keys generated by the user terminal, receiving user authentication information, the user authentication information having been generated by a user authentication server and transmitted to the user terminal, storing the received terminal public key when validity of the user authentication information is confirmed through a communication with the user authentication server, receiving a payment request from the user terminal, receiving, from the user terminal, electronic signature information that has been encrypted with a terminal private key of the pair of asymmetric keys and decrypting the electronic signature information using the stored terminal public key, is provided.

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Seoul, South Korea

Taehoon Ahn