By　research　on　the　privacy　disclosure　issue　in　cloud　computing,　a　method　for　identify　privacy　disclosure　service　providers　was　proposed.　Firstly,　an　optional　signature　process　and　a　resistant　attack　method　were　introduced.　Then　an　analysis　center　with　text　classification　and　service　classification　based　analysis　algorithm　also　with　testing　method　was　present　to　identify　the　privacy　disclosure　service　providers.　Analyze　and　simulation　results　show　the　method　can　identify　privacy　disclosure　service　providers　well.