EEMCS

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Official URL: http://doi.acm.org/10.1145/1138127.1138130

Abstract

Cryptographic algorithms play an important role in the security architecture of wireless sensor
networks (WSNs). Choosing the most storage- and energy-efficient block cipher is essential, due to
the facts that these networks are meant to operate without human intervention for a long period of
time with little energy supply, and that available storage is scarce on these sensor nodes. However,
to our knowledge, no systematic work has been done in this area so far.We construct an evaluation
framework in which we first identify the candidates of block ciphers suitable for WSNs, based
on existing literature and authoritative recommendations. For evaluating and assessing these
candidates, we not only consider the security properties but also the storage- and energy-efficiency
of the candidates. Finally, based on the evaluation results, we select the most suitable ciphers for
WSNs, namely Skipjack, MISTY1, and Rijndael, depending on the combination of available memory
and required security (energy efficiency being implicit). In terms of operation mode, we recommend
Output Feedback Mode for pairwise links but Cipher Block Chaining for group communications.

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