MISA: Minimalist Implementation of oneM2M Security Architecture for Constrained IoT Devices

Devices in Internet of Things (IoT) applications are mostly heterogeneous in nature with constrained resources. There is an ominous need to develop inter-operable yet secure solution for such devices which, however, cannot be achieved without following a global standard. This paper provides a minimalist implementation of oneM2M standard's security architecture for IoT devices while considering their constrained nature. We implement our solution in an open source operating system, i.e. Mbed OS. Specifically, a DTLS over UDP protocol model is implemented for the very first time to develop oneM2M security association establishment framework. We exploited OS features inasmuch to address few issues pertinent to DTLS implementation which resulted from device constraints while providing in situ improvisations for lacking support in OS. Performance analysis of DTLS protocol model is carried out on Nucleo-L476RG and Raspberry Pi-2 boards. Mbed OS is integrable on ARM Cortex micro-controllers which can allow easier adoption of our work in many constrained IoT platforms.