In　network　environments,　before　meaningful　interactions　can　begin,　trust　may　need　to　be　established　between　two　interactive　entities　in　which　an　entity　may　ask　the　other　to　provide　some　information　involving　privacy.　Consequently,　privacy　protection　and　trust　establishment　become　important　in　network　interactions.　In　order　to　protect　privacy　while　facilitating　effective　interactions,　we　propose　a　trust-based　privacy　protection　method.　Our　main　contributions　in　this　paper　are　as　follows:　(1)　We　introduce　a　novel　concept　of　k-sensitive　privacy　as　a　measure　to　assess　the　potential　threat　of　inferring　privacy;　(2)　According　to　trust　and　k-sensitive　privacy　evaluation,　our　proposed　method　can　choose　appropriate　interaction　patterns　with　lower　degree　of　inferring　privacy　threat;　(3)　By　considering　interaction　patterns　for　privacy　protection,　our　proposed　method　can　overcome　the　shortcomings　of　some　current　privacy　protection　methods　which　may　result　in　low　interaction　success　rate.　Simulation　results　show　that　our　method　can　achieve　effective　interactions　with　less　privacy　loss.