| 摘要 |
PROBLEM TO BE SOLVED: To prevent the unauthorized copy and to permit the reproduction of a properly recorded disk even by any reproducing device by keeping the intrinsic information respectively peculiar for each information recording medium to record on respective information recording media by the unchangeable method and enciphering the information while taking this intrinsic information as a key to record it on the information recording medium. SOLUTION: When the contents CT are inputted by an input means 100, the intrinsic information DI of the disk D is read by a DI reading means 201 and made to have the functional relation by a DI functionating means 202 to define as F(DI). Then, the contents CT are enciphered by the intrinsic information F(DI) made to have the functional relation to define as E(CT) in a contents enciphering means F(DI) and recording on the disk D by a contents recording means 204. Since the peculiar intrinsic information is previously kept to record and the contents are enciphered by this intrinsic information, the intrinsic information is recorded respectively on the information recording medium, and the contents are reproducible even by the separate reproducing means. |
