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The IPv6 over Low power Wireless Personal Area Networks (6LoWPANs) have turned out to be one of the most emerging field in Wireless Sensor Networks (WSNs) which can be integrated with Internet technology. 6LoWPAN network consists of heterogeneous wireless sensors which have high resource-constraints such as bandwidth, processing power, memory, energy, etc. The resource-constraints put forth many challenges to apply the available standard security protocols such as Transport Layer Security (TLS), Internet Protocol Security (IPSec), Internet Key Exchange version 2 (IKEv2), etc., for the interconnection of Heterogeneous Wireless Sensor Networks (HWSNs) with Internet. To overcome these situations, the researchers aimed to reinforce and adapt the end-to-end security between Internet and the IP enabled sensor networks. The above mentioned security protocols are not modified at the Internet end point in HWSNs. Hence we are proposing a novel Cooperative Key Exchange System (CKES) by using the concept of Chinese Remainder Theorem (CRT). We have used NS2 simulator to implement the proposed concept and also compared with IKEv2.
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