Abstract: Cloudi iremovesi iassociationsi ifromi ibuildingi iupi iin-housei iinformationi istockpilingi iframeworks.i iNonetheless,i idistributedi istoragei ileadsi itoi isecurityi iconcerns.i iCloud-expliciti iandi itraditionali iinsideri idangersi iarei ilookedi ibyi iinformationi iifi itherei ishouldi iarisei iani ioccurrencei iofi igatheringi isharedi iinformation.i iThei isignificanti iissuei iisi ithei iSecurei idatai isharingi ibetweeni iai igatheringi ithati icountersi iinsideri idangersi iofi iauthentici iyeti iperniciousi iclients.i iIni ithisi ipaper,i iwei iproposei ithei iSecurei iDatai iSharingi iini iCloudsi iprocedurei ithati igives:i i1)i iinformationi iprivacyi iandi itrustworthiness;i