Roland Corporation

Naoyuki Ide

Ikuo Tanaka

Koji Iida

A data using device includes: a data storage part storing pieces of data used for the predetermined process; a user storage part storing a first user identification information; an authentication data acquisition part; a user acquisition part acquiring a second user identification information from the external apparatus; a user determination part; an authentication storage processing part storing the authentication data such that the authentication data is available for the predetermined process when the user determination part determines that the first and second user identification information match each other or when the first user identification information is not stored; a user deletion part deleting or instructing a user to delete the first user identification information when the first and second user identification information do not match each other; and a data use prohibition part prohibiting use of the authentication data when the first user identification information is deleted.

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Shizuoka, Japan

Naoyuki Ide