Energy Efficient GroupKeyManagement Scheme forWireless Sensor Networks (Invited Paper)
Jun‐Sik Lee, Seung‐Woo Seo · 2007
A large-scale sensor network often requires anet-categorized intothree distinct areas basedontheroleand workwidegroupkeyforconfidentiality ofcontrol messages position ofKDC (KeyDistribution Center): Centralized, De- anddatareports. Thegroupkeyshould beupdated whena centralized, andDistributed groupkeymanagement schemes. certain sensornodeiscompromised byadversaries ina hostile ' r r t s r environment. However, keyupdate messages will consume much We cancomparetheperformance o Iscnemes from energy during hop-by-hop delivery toeachsensor nodes. Inthistheaspects oftheir computation, communication andstorage paper, wepropose anewgroup keymanagement scheme whichoverhead. In(26), authors proposed averyefficient keytree minimizes communication overhead ofrekeying messages. To basedgroupkeymanagement scheme, LKH (Logical Key achieve this goal, wefirst give detailed analysis ofcommunication Hierarchy). Whenthere aren nodes, bybuilding atreeof overhead oftheexisting logical keytreescheme. ThenwepresentKEKs (KeyEncryption Key)withaGK (Group Key)atthe thetopological keyhierarchy scheme whichexplicitly considers root (K ey could rey) threKe(Grounication sensor network topology during keytreegeneration. We show rootofthetree, theycould reduce therekeying communication that ourscheme candrastically reduce communication overheads overhead from0(n)to0(log(n)). However, compared to ofthetreebasedgroupkeymanagement inwireless sensorrelatively large bandwidth andwidecoverage ofthecurrent networks. Internet environment, sensor network's specific constraints