The present invention relates to new song authentication system of a server-based real time song player using a terminal, which includes a song player for storing a song accompaniment and reproducing the song accompaniment if there is authentication data for authorizing permission to reproduce the stored song accompaniment; and an information processing device for performing the update and management of the authentication data. The system includes a relay terminal for establishing a direct server-based real-time communication environment between karaoke machine and the information processing device to be connected with each other through a network bridge when authenticating a karaoke song between the karaoke machine and the information processing device. The karaoke machine and the information processing device are bridged with each other to make direct authentication encrypted communication under a direct server based real time communication environment formed by the terminal, thereby performing song accompaniment authentication and updating the authentication data. The effect (for example, the convenience of authenticating a song accompaniment) resulting from authenticating the song accompaniment using an existing mobile terminal can be produced, and problems (for example, a risk of hacking and the complexity of the song authentication procedure) caused when the song accompaniment is authenticated using an existing mobile terminal are solved.;COPYRIGHT KIPO 2016
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