| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent the unauthorized use of a content. <P>SOLUTION: An encryption system includes: an encryption section for encrypting a content by creating a cryptographic key from a physical address of an area from which the content is written to a storage medium, and an identifier of the content; an address acquisition section for obtaining the physical address; a decryption section for creating a cryptographic key with the same logic as that of the cryptographic key, and decrypting the encrypted content using the created cryptographic key; and a control section for generating and extinguishing the address acquisition section and the decryption section. <P>COPYRIGHT: (C)2007,JPO&INPIT |
