| 摘要 |
<P>PROBLEM TO BE SOLVED: To allow the more free use of contents while suppressing unlimited copying. <P>SOLUTION: When an IC card 1 gets close to a television receiver 2, a hard disc recorder 3 and a PDA 4, the card ID stored in the IC card 1 and the profile of the equipment are shared to form a VPN (virtual private network) 5. When the download of a content is requested from the hard disc recorder 3, a content delivery server 161 transmits the content according to the request to store it in the hard disc recorder 3. When the regeneration of the stored content on the television receiver 2 is instructed, the authentication between the hard disc recorder 3 and the television receiver 2 is performed on the basis of the card ID, and the content is transmitted to the television receiver 2 when the television receiver 2 is authenticated. <P>COPYRIGHT: (C)2003,JPO |
