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2008
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On the Energy Cost of Communication and Cryptography in Wireless Sensor Networks

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On the Energy Cost of Communication and Cryptography in Wireless Sensor Networks
Energy is a central concern in the deployment of wireless sensor networks. In this paper, we investigate the energy cost of cryptographic protocols, both from a communication and a computation point of view, based on practical measurements on the MICAz and TelosB sensors. We focus on the cost of two key agreement protocols: Kerberos and the Elliptic Curve Diffie-Hellman key exchange with authentication provided by the Elliptic Curve Digital Signature Algorithm (ECDH-ECDSA). We find that, in our context, Kerberos is around one order of magnitude less costly than the ECDH-ECDSA key exchange and confirm that it should be preferred in situations where a trusted third party is available. We also observe that the power dedicated to communications can become a central concern when the nodes need to stay in listen mode, e.g. between the protocol rounds, even when reduced using a Low Power Listening (LPL) protocol. Therefore, listening should be considered when assessing the cost of cryptogr...
Giacomo de Meulenaer, François Gosset, Fran
Added 01 Jun 2010
Updated 01 Jun 2010
Type Conference
Year 2008
Where WIMOB
Authors Giacomo de Meulenaer, François Gosset, François-Xavier Standaert, Olivier Pereira
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