In Wireless ad hoc network the network formed without need of any central infrastructure. The nodes are connected each other with the use of a wireless interface to send packet data. There are two main reason of packet dropping one is linkage error and other one is malicious packet dropping in wireless ad hoc network. The packet losses are present in the network that both caused by linkage errors or by the both of linkage errors and malicious drop. In the interior-attack case, whereby malicious nodes that are part of the route utilize their knowledge of the communication framework to selectively drop a small amount of packets vital to the network performance. This is because the packet dropping rate is comparable to the channel error rate. Conventional algorithms are used to detect the packet loss rate that cannot reach acceptable detection accuracy. We proposed to improve the detection accuracy. So we developed the correlations between lost packets and to ensure truthful calculation of these correlations, the homomorphic linear authenticator  ( HLA ) is used. HLA is based on public auditing architecture that allows the detector to verify the truthfulness of the packet loss information reported by nodes. This development is privacy protect, scam proof, and low communication and storage overheads. It reduce the computation overhead, a packet -block based method is also proposed, which allows one to trade detection truthfulness for lower computation complexity. The proposed mechanisms obtain much better detection accuracy than conventional methods.