Unmanned Arial Vehicles (UAVs) can be applied to survey or for monitoring huge crowd where conventional monitoring systems fail. Even though UAVs is proven to be effective way for monitoring and surveying there present a threat of data getting leaked when it is being transferred to the user’s device. To lessen these dangers a secure channel amid the user and the UAVs needs to be determined. There are multiple key agreement methods which is already present but they are either heavy authentication type or less secure to the attacks from the unscrupulous parties. In this paper, we provide an approach to mitigate such threats using a public key cryptographic method with a session-based authentication. The above-mentioned method is simulated using NS2 software and it’s efficiency will be recorded at the end.