Through　building　the　neighbor　list,　we　propose　effective　pairwise　key　storage　and　update　methods.　The　structure　of　the　neighbor　list　is　simple　and　can　save　the　storage　space　for　the　node.　By　using　the　pseudo　random　function　and　the　elliptic　curve　digital　signature　algorithm,　we　establish　the　pairwise　keys　decentralized　completely　and　solve　the　new　node　joining　problem.　Analysis　shows　that　neighbor-list　based　pairwise　key　management　scheme　is　energy　efficient.