In　network　environments,　the　entities　that　connect　to　or　interact　with　each　other　may　know　very　little　about　each　other　or　without　prior　knowledge　at　the　beginning　of　an　interaction.　Therefore,　in　many　cases,　before　a　serious　interaction　begins,　trust　must　be　established　between　the　interactive　entities.　During　trust　establishment,　an　entity　may　require　the　other　entity　to　provide　some　information　that　could　contain　some　privacy　about　the　entity,　leading　to　privacy　loss.　On　the　other　hand,　such　information　exchange　can　help　establish　trust　between　the　interactive　entities.　Consequently,　it　is　important　to　understand　the　relationship　between　trust　and　privacy.　In　this　paper,　we　study　the　relationship　between　trust　and　privacy　in　network　environments　based　on　game　theory　in　which　we　consider　the　facticity　of　the　information　that　the　entities　exchanged.　Through　some　application　scenarios,　we　show　how　our　model　can　be　applied　in　network　interactions　between　entities.　©　2014　Inderscience　Enterprises　Ltd.