| 摘要 |
[Problem] Analysis of integrated user attribute information has been difficult while assuring anonymity of user attribute information managed by a plurality of devices. [Solution] Integrated user attribute information can be analyzed while maintaining anonymity of the user attribute information managed by two or more first devices by an information system (1), which is an information system having two or more first devices and an integrating device, wherein the first devices are each provided with an encrypting unit that encrypts user attribute information by a predetermined method using unknown information and acquires new user attribute information and a first transmission unit that transmits the new user attribute information to the integrating device, and the integrating device is provided with a new user attribute information receiving unit that receives new user attribute information from the two or more first devices, an integrated user attribute information acquisition unit that acquires integrated user attribute information from two or more sets of new user attribute information received by the new user attribute information receiving unit using a method corresponding to the predetermined method, and an output unit that outputs the integrated user attribute information. |
