earticle

영어

In Wireless Sensor Network security has to be mainly provided to two types of
communications: one-to-all and one-to-one. This paper proposes a complete set of low
complexity protocols to initially generate and distribute two types of secret keys, periodically
renew the keys and change the keys based on cluster dynamics. They are designed for a
clustered hierarchical network suitable for data aggregation and all the communications in
the protocols are properly authenticated using Elliptic Curve Digital Signature scheme. The
security analysis shows that the protocols are strong against several possible attacks. The
protocols are implemented for TinyOS using NesC, simulated under TOSSIM and are viable
for implementation in resource-constrained platforms like MICA. A major outcome of our
simulation is the observation that most of the time rekeying is done because of cluster
dynamics. It is therefore suggested that implementing proper authentication protocols and
batch rekeying protocols reduce the number of times rekeying is performed, resulting in
longer life of the network.