Auth-Lite: Lightweight M2MAuthentication reinforcing DTLS for CoAP

The resource constrained characteristic of M2M systems has made secure channel establishment for sensor data communication a challenging task. While the proposed Constrained Application Protocol (CoAP) from Internet Engineering Task Force (IETF) enables lightweight application layer for sensor devices and gateways, lightweight security protocol on DTLS-secured CoAP (CoAPs) is still not optimally achieved. CoAPs proposes different modes of security starting from pre-shared key to certificate mode. This paper investigates the performance of the payload embedded novel authentication and key management mechanism proposed by the authors, which is robust in nature, compared to pre-shared key mode CoAPs, as well as lightweight. The proposed scheme can be integrated in future with pre-shared key mode of DTLS to reinforce DTLS for mutual authentication. We prove efficacy of our proposed scheme based on comparative analysis with pre-shared key mode of CoAPs.