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The Multihop Wireless Networks have received great attention in recent years, owing to the rapid proliferation of wireless devices. The wireless routing protocols assume that the nodes are cooperating and well-behaving. However, such networks are subject to several active routing attacks such as dropping, flooding, and modification. The primary intention of such attack is to thwart the objectives of routing protocols and cause network malfunction. This state of affairs motivates the recent research towards the development of a sophisticated security framework that works well against active routing attacks. This paper proposes GUARD, an intrusion detection framework that aims at detecting the active routing attacks efficiently with a considerable reduction in energy consumption. The GUARD incorporates three mechanisms such as a Restricted Directional Watchdog Selection, a Game Design, and an …