| 摘要 |
In an information recording device (10), a content control unit (14a) divides an input content into a plurality of sections and further subdivides each section into recording units with predetermined data amounts. An attached information generating unit (14b) generates attached information necessary for making use of the input information and license. An encrypting unit (15) generates encrypting information by using a number that is included in the attached information and that is allocated to the input information, and encrypts information included in the recording unit by the encrypted information. Further, the information encrypted by the encrypting unit, the attached information corresponding to the input information and the license are associated with every section divided by the content control unit through an outside input and output I/F(11) and the associated information and the license are recorded on a recording medium. Thus, with the encrypting information simply changed for every short section, encrypting and recording are carried out. |
