KALwEN: A new practical and interoperable key management scheme for body sensor networks
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(Published version)
Date
2011
Authors
Law, Y.W.
Moniava, G.
Gong, Z.
Hartel, P.
Palaniswami, M.
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Security and Communication Networks, 2011; 4(11):1309-1329
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Abstract
Key management is the pillar of a security architecture. Body sensor networks (BSNs) pose several challenges-some inherited from wireless sensor networks (WSNs), some unique to themselves-that require a new key management scheme to be tailor-made. The challenge is taken on, and the result is KALwEN, a new parameterized key management scheme that combines the best-suited cryptographic techniques in a seamless framework. KALwEN is user-friendly in the sense that it requires no expert knowledge of a user, and instead only requires a user to follow a simple set of instructions when bootstrapping or extending a network. One of KALwEN's key features is that it allows sensor devices from different manufacturers, which expectedly do not have any pre-shared secret, to establish secure communications with each other. KALwEN is decentralized, such that it does not rely on the availability of a local processing unit (LPU). KALwEN supports secure global broadcast, local broadcast, and local (neighbor-to-neighbor) unicast, while preserving past key secrecy and future key secrecy (FKS). The fact that the cryptographic protocols of KALwEN have been formally verified also makes a convincing case. With both formal verification and experimental evaluation, our results should appeal to theorists and practitioners alike
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Copyright 2010 John Wiley and Sons
Access Condition Notes: Accepted manuscript is available open access