| 摘要 |
PROBLEM TO BE SOLVED: To achieve reliable copyright protection by suppressing illegal use without deteriorating a data user's convenience in using contents. SOLUTION: This data use restriction control method comprises a data use history preparing means 3 preparing data use history information ct including use start time and use end time when using data b by a data using means 2; a data use history transmitting means 5 transmitting the data use history information ct to the outside; a data use history receiving means 6 receiving data use history information cr from the outside; and a data use history comparing means 7 comparing each data use history information and issuing duplicate device use notice information d showing that data use time is overlapped when the data use time obtained based on any data use history information included in the data use history information ct overlaps with data use time obtained based on any data use history information included in the data use history information cr. COPYRIGHT: (C)2007,JPO&INPIT |
