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Among various security measures, secure group key agreement for VANETs attracts more and more attention. Researchers have studied generic group key agreement schemes for a long while; however, most of them are not designed for VANETs. Considering energy-constrained and fast moving features in vehicular ad hoc network, we propose a new location-based distributed group key agreement LDGKA scheme for VANETs. We adopt a hybrid approach in which members in the vehicular ad hoc network form various logic groups in the same region. Within each group, virtual key tree model is employed so that the rekeying operation can be efficiently carried out when members leave or join. It only requires to rebuild [Formula: see text] keys when one node leaves or joins. Moreover, we adopt one-way key derivation to rebuild keys in order to reduce communication overhead of distributing new keys. We also design a protocol for establishing the secure temporary channel dynamically for the nodes that are located in different regions. <\/jats:p>","DOI":"10.1155\/2014\/759601","type":"journal-article","created":{"date-parts":[[2014,2,23]],"date-time":"2014-02-23T21:05:28Z","timestamp":1393189528000},"page":"759601","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":10,"title":["Location-Based Distributed Group Key Agreement Scheme for Vehicular Ad Hoc Network"],"prefix":"10.1177","volume":"10","author":[{"given":"Eric Ke","family":"Wang","sequence":"first","affiliation":[{"name":"Shenzhen Graduate School, Harbin Institute of Technology, HIT Campus, Shenzhen University Town, Xili, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuming","family":"Ye","sequence":"additional","affiliation":[{"name":"Shenzhen Key Laboratory of Internet Information Collaboration, Shenzhen Graduate School, Harbin Institute of Technology, HIT Campus, Shenzhen University Town, Xili, Shenzhen 518055, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofei","family":"Xu","sequence":"additional","affiliation":[{"name":"Harbin Institute of Technology, 92 West Dazhi Street, Nan Gang District, Harbin 150001, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,2,22]]},"reference":[{"key":"B1-2014-759601","doi-asserted-by":"publisher","DOI":"10.1109\/49.839937"},{"key":"B2-2014-759601","doi-asserted-by":"publisher","DOI":"10.1109\/71.877936"},{"first-page":"662","volume-title":"Proceedings of International Conference on Networking (ICN '05)","author":"Khurana H.","key":"B3-2014-759601"},{"key":"B4-2014-759601","doi-asserted-by":"publisher","DOI":"10.1016\/j.tcs.2008.10.034"},{"key":"B5-2014-759601","doi-asserted-by":"publisher","DOI":"10.1145\/984334.984337"},{"key":"B6-2014-759601","doi-asserted-by":"publisher","DOI":"10.1145\/1089803.1089975"},{"volume-title":"Proceedings of the 10th IEEE Symposium on Computers and Communications (ISCC '05)","author":"Adusumilli P.","key":"B7-2014-759601"},{"first-page":"1","volume-title":"Proceedings of the ACM Workshop on Wireless Security (WiSe '05)","author":"Zhou L.","key":"B8-2014-759601"},{"issue":"1","key":"B9-2014-759601","first-page":"90","volume":"4","author":"Abdel-Hafez A.","year":"2007","journal-title":"International Journal of Network Security"},{"key":"B10-2014-759601","doi-asserted-by":"publisher","DOI":"10.1145\/1298239.1298263"},{"key":"B11-2014-759601","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"crossref","first-page":"305","DOI":"10.1007\/978-3-540-77690-1_19","volume-title":"Proceedings of the 5th European Conference on Wireless Sensor Networks (EWSN '08)","volume":"4913","author":"Szczechowiak P."},{"key":"B12-2014-759601","series-title":"Lecture Notes in Computer Science","doi-asserted-by":"crossref","first-page":"120","DOI":"10.1007\/978-3-540-89641-8_9","volume-title":"Proceedings of the 7th International Conference on Cryptology and Network Security (CANS '08)","volume":"5339","author":"Galindo D."},{"key":"B13-2014-759601","doi-asserted-by":"publisher","DOI":"10.1109\/WCSP.2009.5371642"},{"key":"B14-2014-759601","doi-asserted-by":"publisher","DOI":"10.1016\/j.tcs.2008.10.034"},{"key":"B15-2014-759601","volume":"75","author":"Rahman R. 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