Implementing Public-Key Infrastructure for Sensor Networks

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Implementing Public-Key Infrastructure for Sensor Networks

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dc.contributor.author Malan, David
dc.contributor.author Smith, Michael
dc.contributor.author Welsh, Matt
dc.date.accessioned 2009-05-21T16:52:01Z
dc.date.issued 2008
dc.identifier.citation Malan, David, Matt Welsh, and Michael D. Smith. 2008. Implementing public-key infrastructure for sensor networks. ACM Transactions on Sensor Networks 4(4): 22. en
dc.identifier.issn 1550-4859 en
dc.identifier.uri http://nrs.harvard.edu/urn-3:HUL.InstRepos:2962661
dc.description.abstract We present a critical evaluation of the first known implementation of elliptic curve cryptography over F<sub>2p</sub> for sensor networks based on the 8-bit, 7.3828-MHz MICA2 mote. We offer, along the way, a primer for those interested in the field of cryptography for sensor networks. We discuss, in particular, the decisions underlying our design and alternatives thereto. And we elaborate on the methodologies underlying our evaluation. Through instrumentation of UC Berkeley's TinySec module, we argue that, although symmetric cryptography has been tractable in this domain for some time, there has remained a need, unfulfilled until recently, for an efficient, secure mechanism for distribution of secret keys among nodes. Although public-key infrastructure has been thought impractical, we show, through analysis of our original implementation for TinyOS of point multiplication on elliptic curves, that public-key infrastructure is indeed viable for TinySec keys' distribution, even on the MICA2. We demonstrate that public keys can be generated within 34 seconds and that shared secrets can be distributed among nodes in a sensor network within the same time, using just over 1 kilobyte of SRAM and 34 kilobytes of ROM. We demonstrate that communication costs are minimal, with only 2 packets required for transmission of a public key among nodes. We make available all of our source code for other researchers to download and use. And we discuss recent results based on our work that corroborate and improve upon our conclusions. en
dc.description.sponsorship Engineering and Applied Sciences en
dc.language.iso en_US en
dc.publisher Association for Computing Machinery en
dc.relation.isversionof http://doi.acm.org/10.1145/1387663.1387668 en
dc.relation.hasversion http://www.cs.harvard.edu/~malan/publications.shtml en
dash.license META_ONLY
dc.title Implementing Public-Key Infrastructure for Sensor Networks en
dc.type Journal Article
dc.description.version Version of Record
dc.relation.journal ACM Transactions on Sensor Networks en
dash.depositing.author Malan, David
dash.embargo.until 10000-01-01

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