Abstract: In wireless ad hoc network, there are two sources for packet loss i.e. link errors and malicious packet dropping. It is important to determine whether the losses are caused by link errors only, or by combined effect of link errors and malicious drop. Here, we are especially interested in the insider attacker case where malicious nodes drops packet selectively to degrade the network performance. Packet dropping rate in the insider attack case is nearly equal to normal link error because of which existing algorithms cannot find the exact reason of packet loss. We are going to find the correlation between lost packets and to ensure that these correlations are accurate we are going to use Homomorphic Linear Authenticator (HLA) based public auditing mechanism. The HLA architecture is privacy preserving and collusion proof.

Keywords: Packet loss, Truthful detection, Homomorphic Linear Authenticator, Cryptography.