TheExpansion ofKeyInfection ModelforDynamic Sensor Network

Theestablishment ofshared cryptography keys is prevailing scheme using symmetric cryptography isRandom oneofthechallenging problems inthesensor networks. Key keypre-distribution (2,3,4),whichscheme usespre-loaded Infection (1) isapromising model tosolve this problem withoutkeyson thesensor's memory,andestablishing secure complex mechanism onthecommodity sensor networks. This connection isbased onprobability that eachother sensor nodes model, however, doesnotconsider themobility ofsensor, soit havethecommon shared keys. Tomaintain highprobability, cannotsupport dynamic sensornetwork fields. Therefore, key therefore, each sensornoderequires alotofmemories tostore infection modelhastobeextended tohandlethemobility of sensor, andthenextended keyinfection model canbeusedonthe pre-loaded keys. Tocopewiththis problem thatalotof dynamic sensor network. Inthis paper, wepropose ascheme to memories arerequired ofeachsensor node, R.Anderson etal. extend keyinfection modelforsupporting dynamic sensorproposed another schemethatdoesnotneedpre-distributed networks andexplain howtheproposed scheme isoperated in keyset, that isKeyInfection (1). detail. Alsoweprove that theproposed scheme issecure. Keyinfection modelassumes environment withapartially present passive adversary. And,thetimewhile thenodes are