The major threat to wireless network is Denial of Service attack. An adversary can target on the communication of the nodes and can attempt to create an attack to prevent the efficient communication. Here, we address the problem of jamming under an internal threat model by considering a sophisticated adversary who is aware of the network secrets and the implementation details of network protocols at any layer in the network stack. The jammer can classify the transmitted packets in real time by decoding the first few symbols of an ongoing transmission. With this internal knowledge, the adversary targets specific message of high importance. Our aim is to delay the jamming node from classifying a packet in real time, thus mitigating the jamming node’s ability to perform selective jamming by preventing real time packet classification.