Abstract: A method for providing a digital product according to the present invention comprises the steps of: receiving a request to provide a digital product of a digital product providing server from a terminal of a user; obtaining a login server user identifier of the user for a unique application identifier by logging in to a login server using the unique application identifier; storing digital product providing information in a database in association with the login server user identifier on the basis of the request to provide the digital product of the digital product providing server; and transmitting the digital product providing information to the digital product providing server in association with the login server user identifier, thereby being able to conveniently provide the digital product by synchronizing a user account.

Abstract: A communication method is securely performed by a communication device having a predefined URL. The communication method includes transmitting a first request, receiving a second request transmitted to the predefined URL, determining whether the second request corresponds to the first request, transmitting a response for the second request according to a result of the determination, and receiving a response for the first request. This method makes it possible to easily build and manage a system.

Abstract: The present disclosure pertains to a method for providing digital goods using a URL coupon. The method includes: generating a digital goods provision URL containing information on digital goods; generating a URL coupon containing the digital goods provision URL; providing the URL coupon; receiving a digital goods provision request at the digital goods provision URL; authenticating a user; and transmitting an information processing request containing authenticated user information and digital goods identification information to a digital goods managing server. The method makes it possible to provide digital goods in an easy and safe manner.

Abstract: A communication method is securely performed by a communication device having a predefined URL. The communication method includes transmitting a first request, prior to receiving a response for the first request, receiving a second request transmitted to the predefined URL, determining whether the second request is for verifying whether the first request is transmitted by the communication device, transmitting a response for the second request according to a result of the determination, and receiving the response for the first request.