Probabilistic Full Disclosure Attack on IoT Network Authentication Protocol

The Internet of Things (IoTs) is one of the most promising technologies of 5G. The IoTs is basically a system of interconnected computing devices which are provided with unique identification number and capability of transmitting information without human intervention. Since the computing devices (sensors) in IoTs communicate with each other using wireless channel which is accessible for all types of adversaries. Therefore, mutual authentication protocols play an important role for secure communication between the computing nodes. Recently Tewari and Gupta proposed an extremely lightweight authentication protocol to ensure the security and privacy of IoT networks in a cost-effective manner. The proposed protocol uses only two bitwise logical operators; Rotation and XOR and claimed to be one of the most secure Ultralightweight Mutual Authentication Protocol (UMAP). In this paper we have highlighted probabilistic full disclosure attack on the said protocol and challenged their security claims. The proposed attack model is passive and success probability is close to unity.