| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively utilize network resources and to share contents by realizing a secure cache that prevents contents from being illegally copied and intercepted. <P>SOLUTION: The cashing and authentication of contents themselves are separated from each other, and encryption is performed to distribute the contents. For that purpose, a contents storage device 200 stores contents received from a contents provider 300 in a contents storing part 230. A contents key 330 generated by the contents provider 300 is used to encrypt the contents and distribute the encrypted contents to a user 100 in response to a request from the user 100. <P>COPYRIGHT: (C)2004,JPO |
