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A secure network-layer bridge for wireless sensor networks

Palavras Emmanouil

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Year 2017
Type of Item Diploma Work
Bibliographic Citation Emmanouil Palavras, "A secure network-layer bridge for wireless sensor networks", Diploma Work, School of Electrical Computer Engineering, Technical University of Crete, Chania, Greece, 2017
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As the Internet of Things (IoT) is becoming more and more popular, Wireless Sensor Networks (WSNs) market share increases, due to their efficiency. WSNs typically consist of embedded nodes with inherent limitations in processing power, energy, memory and communications bandwidth. It is an emerging technology that demonstrates true potential through many applications. Although they can be easily integrated into existing systems and products, hostile environments mandate the deployment of secure schemes to protect sensitive data being transmitted. Standardized security mechanisms, though, were not designed with resource restrictions in mind, rendering their applicability in such environments ineffective, if not impossible.6LoWPAN (IPv6 over Low-power Wireless Personal Area Networks) activities have paved the way for using IPv6 protocols in WSNs by introducing appropriate header compression formats. These allow the efficient exchange of IPv6 packets over IEEE 802.15.4 based networks. However, when a message protected with encryption methods that utilize header compression needs to cross the boundaries of a WSN and establish a secure channel with a remote party, thus offering end-to-end security, a gateway should be used that will facilitate message relay from one network to the other without removing protection.This thesis explores appropriate solutions and describes the implementation of a secure gateway that can be deployed by a WSN to ensure end-to-end security between a sensor node and a remote party. This requires the development of a border router to guarantee seamless communication between WSNs and infrastructure nodes that allows secure remote access to WSN resources to authorized parties. Moreover, the secure gateway enables the communication between nodes that implement different protocols or are outside the WSN (e.g. Ethernet).

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