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Nt1330 Unit 7 Exercise 1

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must have contacted this node previously or have received a message from other nodes.

• The routing table structure is modified to store the trust value for each entry of source to destination when receiving a positive of a node that is not a selfish node. From the receiver point of view a perfect malicious node will always provide wrong information. In this case, the malicious node, in order to send wrong information must know the state of each node.

• AODV sends request to update the routing path at regular intervals. Hence, at regular intervals, source node is going to have multiple paths each with its trust value from which one with the maximum trust is selected it can transmit this information to it so, from that moment on, both nodes store information about this positive (or negative) detections. Therefore, a node can become aware about selfish nodes directly (using …show more content…
The method to handle RREP packet is changed to update the route entry when new path is received with greater trust than current trust value to send RREQ packet to destination every time thereby disabling the mechanism to initiate RREP packet at intermediate nodes.

Behavior of malicious nodes is modeled from the receiver perspective, which is based on the probability of receiving wrong information about a given node when a contact with a malicious node occurs (that is, it receives a Negative about the selfish node and a Positive about the other nodes). This behavior is known as the maliciousness probability. Below we detail several aspects that can affect this probability:

• The reception of information, considering that not all contacts produce this reception. This aspect is similar to the collaboration degree (that is, the pc parameter), but an increase of communication range of the malicious nodes will increase the information

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