Social Networking services have been opened recently. With that, the interconnection has been frequently conducted between services, which includes entrusting the authentication and bringing the data to other service. In this way, when users disclose their personal information from a service holding them to other services, they need to confine the disclosure to protect their privacy. In this paper, we propose a method to support users determining what attribute to disclose by evaluating risks of disclosure attributes using ontology in such connections. We also present a framework that accumulates them, and that user can refer the result.