In modern sensor networks, key management is essential to transmit
data from sensors to the sink securely. That is, sensors are likely
to be compromised by attackers, and a key management scheme should
renew the keys for communication as frequently as possible. In
clustered sensor networks, CHs(Cluster Heads) tend to become targets
of compromise attack because they collect data from sensors and
delivers the aggregated data to the sink.
Cluster Head Election; Key Renewal; Wireless Sensor Network