April 2014
Intermediate to advanced
538 pages
17h 31m
English
Content preview from Security for Multihop Wireless Networks
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Taxonomy of Security Protocols ◾ 325
LEAP supports the establishment of four types of keys:
◾ Individual keys: Keys shared between each node and the BS.
◾ Pair-wise shared keys: Pair-wise keys shared between a node and each of its
neighbors.
◾ Cluster keys: Keys shared among a set of neighboring nodes. ey are used
to protect local broadcast messages and to allow the implementation of in-
network processing techniques.
◾ Group key: Key shared among all the nodes of the sensor network. It is used
to protect broadcast messages, usually sent by the BS.
12.3.1.1 Key Establishment Mechanisms
Individual keys are computed by applying a pseudorandom function to the master
key (MK) shared between each node and the BS. erefore, no message exchange
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