08-16-2017, 08:38 PM
A group of sensor nodes work
collaboratively to perform a common application. In
many WSN applications, the sensor nodes are
battery driven and they are often very difficult to
recharge or change the batteries. Prolonging
network lifetimes a critical issue. Sensors often have
long period between transmissions. This mechanism
allows to identify replicas that are formed in the
mobile sensor network. These replicas are formed
due to the node replication attack in which an
adversary compromises one node, fabricate many
replicas having the same identity (ID) from the
captured node, and place them back into strategic
positions in the network. The replicas can easily
launch insider attacks, without easily being detected.
To detect the node replicas, two localized
algorithms, eXtremely Efficient Detection (XED)
and Efficient Distributed Detection (EDD) are used.
Each node shares a different secret key with all its
neighbors when it communicates for the first time.
When a node receives a message it asks for the
random key and verifies it. If the key matches it
receives the message. If key does not match the
sender node is clone node. In the EDD algorithm,
when a node receives a message it asks for the last
communicated location. If the location matches it
receives the message. If location differs, the sender
node is clone node. If any node informs next
position where it going to move and if it doesn t
move to that position means it is considered as
malicious node and maintained by the neighbors. If
misbehavior length is reached to given limit means,
then it is also considered a clone node.