DTLS Connection Identifiers for Secure Session Resumption in Constrained IoT Devices

This paper presents the design and implementation of DTLS v1.2 connection identifiers for secure session resumption in case of 5-tuple changes, in order to avoid a costly re-handshake process. Our implementation is based on the tinyDTLS and Contiki OS, and we show its feasibility on constrained IoT devices, while providing information on the incurred overhead in terms of the execution time, memory utilisation, and network traffic.