Secure Mobility Management using CoAP in the Internet of Things

For efficient IoT mobility management, CoAP-based mobility management protocol (CoMP) was proposed to counteract constraints of mobility internet protocol version 6 (MIPv6). CoMP exchanges Binding Update (BU) messages to manage location changes but the BU messages are subjected to security vulnerabilities like denial of service (DoS), false BU, session hijacking, and man in the middle (MITM) attacks. In this paper, we extend CoMP by proposing a security scheme based on a private key to protect the BU CoMP messages exchanged between the mobile nodes and clients referred to as PKBU-CoMP (private key-based BU for CoMP). PKBU-CoMP ensures that clients check address ownership and validity of mobile nodes before performing any BU operation. A detailed signalling flow diagram was designed, and we conducted a performance analysis of the PKBU-CoMP.