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Since key management plays an important role in securing both information and connectivity, a proper authentication and key management scheme is required in mobility enabled applications where the authentication of a node with the network is a critical issue. In this paper, we present an authentication and key management scheme supporting node mobility in a heterogeneous WSN that consists of several mobile sensor nodes and a few fixed sensor nodes. We analyze our proposed solution by using the OMNET++ simulator to show that it requires less memory space and provides better connectivity and network resilience against node capture attacks compared to some existing schemes. We also propose two levels of secure authentication methods for the mobile sensor nodes for secure authentication and key establishment. <\/jats:p>","DOI":"10.1155\/2014\/718286","type":"journal-article","created":{"date-parts":[[2014,11,18]],"date-time":"2014-11-18T21:05:30Z","timestamp":1416344730000},"page":"718286","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":5,"title":["Online Authentication and Key Establishment Scheme for Heterogeneous Sensor Networks"],"prefix":"10.1177","volume":"10","author":[{"given":"Sarmad Ullah","family":"Khan","sequence":"first","affiliation":[{"name":"Electrical Department, CECOS University, Peshawar 25000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9762-6522","authenticated-orcid":false,"given":"Luciano","family":"Lavagno","sequence":"additional","affiliation":[{"name":"Electronics and Telecommunication Department, Politecnico di Torino, 10129 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Claudio","family":"Pastrone","sequence":"additional","affiliation":[{"name":"Istituto Superiore Mario Boella (ISMB), Pervasive Radio Technologies (PeRT) Lab, 10138 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maurizio A.","family":"Spirito","sequence":"additional","affiliation":[{"name":"Istituto Superiore Mario Boella (ISMB), Pervasive Radio Technologies (PeRT) Lab, 10138 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2014,11,18]]},"reference":[{"key":"B1-2014-718286","doi-asserted-by":"publisher","DOI":"10.1016\/j.comcom.2007.04.009"},{"key":"B2-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/18.825799"},{"key":"B3-2014-718286","doi-asserted-by":"publisher","DOI":"10.1016\/S1389-1286(03)00357-8"},{"key":"B4-2014-718286","first-page":"3138","volume-title":"Proceedings of the IEEE International Conference on Communications (ICC \u203202)","volume":"5","author":"Xu K."},{"key":"B5-2014-718286","doi-asserted-by":"publisher","DOI":"10.1145\/1031495.1031519"},{"key":"B6-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/INFCOM.2005.1498318"},{"key":"B7-2014-718286","doi-asserted-by":"publisher","DOI":"10.1145\/586110.586117"},{"key":"B8-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/WiMob.2008.79"},{"key":"B9-2014-718286","doi-asserted-by":"publisher","DOI":"10.1016\/j.adhoc.2006.05.012"},{"key":"B14-2014-718286","doi-asserted-by":"publisher","DOI":"10.1023\/A:1016598314198"},{"first-page":"197","volume-title":"Proceedings of the IEEE Symposium on Security and Privacy","author":"Chan H.","key":"B15-2014-718286"},{"key":"B16-2014-718286","doi-asserted-by":"publisher","DOI":"10.1145\/1143549.1143556"},{"first-page":"446","volume-title":"Proceedings of the IET Conference on Wireless, Mobile and Sensor Networks (CCWMSN \u203207)","author":"Zhang J.","key":"B17-2014-718286"},{"key":"B18-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/MOBHOC.2007.4428761"},{"key":"B19-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/WCNC.2007.757"},{"key":"B20-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/WIMOB.2010.5644977"},{"key":"B21-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/.2006.1629447"},{"key":"B22-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/ICC.2007.564"},{"key":"B23-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/WiCom.2008.896"},{"key":"B25-2014-718286","doi-asserted-by":"publisher","DOI":"10.1002\/wcm.72"},{"key":"B11-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/TIT.1976.1055638"},{"key":"B27-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/ICET.2010.5638458"},{"key":"B12-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/GLOCOM.2007.190"},{"key":"B10-2014-718286","doi-asserted-by":"publisher","DOI":"10.1109\/AICCSA.2010.5586995"},{"first-page":"98","volume-title":"Proceedings of the International Conference on Information Society (i-Society \u203211)","author":"Khan S. 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