| 摘要 |
PROBLEM TO BE SOLVED: To estimate whether a plurality of communication terminals are the same even when identification information of the communication terminals is unacquirable.SOLUTION: Advertisement distribution system 20 receives related information on a user terminal 10 from a plurality of user terminals 10. The user terminal 10 cannot be specified from the related information. The similarity of related information received from the plurality of user terminals is determined. According to the similarity, whether the user terminal 10 is the same user terminal 10 is estimated. |
