An electronic device, system, and method are disclosed. The electronic device operates within a system of multiple devices. The electronic device includes a processor which may implement the method, including: receiving a personal information request from an information requesting device, receiving a validation result for the received personal information request from at least one authentication server and verifying the validation result, based on the validity for the received personal information request being verified, retrieving personal information related to the received personal information requested by searching using a search range, and transmitting the retrieved personal information to the information requesting device.