| 摘要 |
An object of the present invention is to reduce a processing load on a server apparatus in a web system which provides contents to a client apparatus on the basis of an access authority of the client apparatus. A server apparatus which provides contents to a client apparatus based on an access authority set on the client apparatus, the server apparatus including: an encryption unit which encrypts information for displaying the contents by the client apparatus, such that the client apparatus can decrypt it; a first generation unit which generates decryption information for a specific user, the decryption information being used for decrypting the encrypted information, and used by the client apparatus for the user; a second generation unit which generates decryption information for all the users by combining the decryption information for the specific users; and a transmission unit which transmits the encrypted information and the decryption information for all the users to the client apparatus in response to the access from the client apparatus. |
