Secure　communication　is　part　of　the　most　important　aspects　for　ad　hoc　networks.　One　cluster　based　Hybrid　Key　Management　Scheme　is　proposed　in　this　paper　for　ad　hoc　networks.　The　clusters　are　constructed　by　the　R-hop　connected　dominating　sets　based　Partition　Algorithm,　which　is　only　with　the　knowledge　of　local　connectivity　information.　Furthermore,　Hybrid　Key　Management　Scheme　can　be　seen　as　an　integration　of　both　the　asymmetric　key　and　symmetric　key　cryptography.　The　asymmetric　one　is　based　on　the　elliptic　curve　cryptosystem,　which　is　an　asymmetric　one.　However,　inter　cluster　key　management　is　based　on　symmetric　key　encryption.　Experimental　results　show　this　scheme　is　reliable　and　it　is　able　to　achieve　higher　success　of　landing　ratio　than　other　comparable　algorithms.　©　2016　ICIC　International.