Security for Multihop Wireless Networks

Security Architecture for Multihop Wireless Sensor Networks  ◾  167

this authentication fails, it sends back a reject message to that node. Otherwise, it

sends a positive join response. e sink saves all the public keys of the nodes in the

network.

is way, whenever a node wants to obtain the public key of another node, it

sends a public key request to the sink with the identifier of the other node (e.g., the

identifier can be its physical address). e sink sends back the public key encrypted

using its private key in order to ensure the authenticity of the sink.

e session key exchange is done with every neighbor with which the routing

protocol need ...