| 摘要 |
<p>Without disclosing behavior information of a user to outside, the invention provides, from outside, a personalized service based on the behavior information. The invention contains a receiving means, a selection means and a sending means. Said receiving means: sends group identification information that identifies second preference information of a group; and receives a group list that contains second preference information having a narrower scope than the second preference information identified by the group identification information, said narrower-scope second preference information being paired with the corresponding group identification information. On the basis of the user behavior information and behavior preference relationship information that indicates the correspondence between the behavior information and first preference information of the user, said selection means selects one item of the group identification information contained in the received group list. Using the paired group identification information and the corresponding second preference information, on the basis of the received group identification information, said sending means generates and sends the group list.</p> |
