In　this　paper,　we　build　a　secure　and　energy-efficient　tree-structure　route　for　the　large-sized　wireless　sensor　networks　with　only　a　resource-constrained　sink　node.　Our　proposed　routing　scheme　has　salient　features:　light　overhead,　quick　formation,　and　immediate　effectiveness.　By　constructing　a　neighbor　table　that　contains　the　related　key　and　energy　information,　the　security　and　energy-efficiency　of　the　route　request　message　and　the　sensing　data　can　be　ensured　adequately.　We　also　adopt　some　effective　energy-conserving　measures,　such　as　data　aggregation,　node　sleep,　sink　move　and　parent　reselection,　etc.,　to　prolong　the　lifetime　of　wireless　sensor　networks.　©　2010　IEEE.