| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform sure protection of a copyright by suppressing unauthorized use without convenience of a data user when contents are used. <P>SOLUTION: This data using apparatus has a data use history information generation means 3 for generating data use history information ct including use staring time c1 and use ending time c2 when data b is used by a data using means 1, a data use history transmitting means 5 for transmitting the data use history information ct to the outside, a data use history receiving means 6 for receiving data use history information cr from the outside and a data use history comparison means 7 for comparing each piece of data use history information and issuing duplicated device use notification information d indicating that data use time is generated in duplicate when the data use time obtained based on any piece of the data use history information included in the data use history information ct is duplicated with data use time obtained based on any piece of data use history information included in the data use history information c4. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
