The document discusses a biometric-based intrusion detection system utilizing Dempster-Shafer theory to enhance security in mobile ad hoc networks (MANETs). It emphasizes the vulnerabilities of MANETs, the importance of multimodal biometric technologies for continuous user authentication, and various security services and challenges in the context of such networks. The paper outlines the integration of biometric authentication with intrusion detection methods to improve security against potential attacks in these dynamic environments.