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However, for the lack of resources, it is different but important to ensure the security of the WSNs. Key management is a corner stone on which to build secure WSNs for it has a fundamental role in confidentiality, authentication, and so on. Combinatorial design theory has been used to generate good-designed key rings for each sensor node in WSNs. A large number of combinatorial design based key management schemes have been proposed but none of them have taken key updating into consideration. In this paper, we point out the essence of key updating for the unital design based key management scheme and propose two key updating methods; then, we conduct performance analysis on the two methods from three aspects; at last, we generalize the two methods to other combinatorial design based key management schemes and enhance the second method.<\/jats:p>","DOI":"10.1155\/2014\/134357","type":"journal-article","created":{"date-parts":[[2014,7,2]],"date-time":"2014-07-02T04:51:47Z","timestamp":1404276707000},"page":"1-8","source":"Crossref","is-referenced-by-count":8,"title":["Key Updating Methods for Combinatorial Design Based Key Management Schemes"],"prefix":"10.1155","volume":"2014","author":[{"given":"Chonghuan","family":"Xu","sequence":"first","affiliation":[{"name":"College of Business Administration, Zhejiang Gongshang University, Hangzhou 310018, China"},{"name":"Contemporary Business and Trade Research Center, Zhejiang Gongshang University, Hangzhou 310018, China"},{"name":"Contemporary Business and Collaborative Innovation Research Center, Zhejiang Gongshang University, Hangzhou 310018, China"}]},{"given":"Weinan","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Computer Science & Information Engineering, Zhejiang Gongshang University, Hangzhou 310018, China"}]}],"member":"311","reference":[{"key":"1","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2002.1024422"},{"key":"2","doi-asserted-by":"publisher","DOI":"10.1109\/COMST.2008.4625802"},{"issue":"8","key":"3","first-page":"1422","volume":"21","year":"2008","journal-title":"Chinese Journal of Sensors and Actuators"},{"key":"7","doi-asserted-by":"publisher","DOI":"10.1109\/TWC.2012.010413.120732"},{"key":"8","doi-asserted-by":"publisher","DOI":"10.1137\/0401024"},{"key":"9","doi-asserted-by":"publisher","DOI":"10.1007\/BF00124896"},{"key":"10","doi-asserted-by":"publisher","DOI":"10.1023\/A:1008209004667"},{"key":"11","doi-asserted-by":"publisher","DOI":"10.1109\/90.650156"},{"key":"12","doi-asserted-by":"publisher","DOI":"10.1016\/S1389-1286(02)00395-X"},{"key":"13","doi-asserted-by":"publisher","DOI":"10.1016\/0166-218X(88)90068-6"},{"key":"14","doi-asserted-by":"publisher","DOI":"10.1109\/TNET.2007.892879"},{"key":"15","doi-asserted-by":"publisher","DOI":"10.1145\/1653760.1653764"},{"key":"18","doi-asserted-by":"publisher","DOI":"10.1016\/j.adhoc.2008.06.003"},{"key":"20","doi-asserted-by":"publisher","DOI":"10.1093\/comjnl\/bxr022"}],"container-title":["Journal of Sensors"],"original-title":[],"language":"en","link":[{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2014\/134357.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2014\/134357.xml","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"http:\/\/downloads.hindawi.com\/journals\/js\/2014\/134357.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2016,8,18]],"date-time":"2016-08-18T08:40:14Z","timestamp":1471509614000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.hindawi.com\/journals\/js\/2014\/134357\/"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014]]},"references-count":14,"alternative-id":["134357","134357"],"URL":"https:\/\/doi.org\/10.1155\/2014\/134357","relation":{},"ISSN":["1687-725X","1687-7268"],"issn-type":[{"type":"print","value":"1687-725X"},{"type":"electronic","value":"1687-7268"}],"subject":[],"published":{"date-parts":[[2014]]}}}