Reference Broadcast-Based Secure Time Synchronization for Industrial Wireless Sensor Networks

Security is an important factor that cannot be neglected in the design of time synchronization algorithms since industrial wireless sensor networks are prone to attacks against physical nodes and communication links. The Sybil attack intelligent with a high destructive capacity pretending multiple identities broadcasting illegitimate messages destroy network operation. Existing secure mostly focus on distributed protocols; however, they pay less attention centralized synchronization. In this paper, we propose novel reference broadcast-based (RSTS) for source attacks. Different from previous protocols, converging structure clock status, RSTS employs public neighbor forwarding mechanism based broadcast filter illegal information automatically. Instead establishing table timestamps packet transmission receipt, least square linear regression utilized estimate compensation relative node recorded calculated difference receiving packets. simulation results demonstrate resilient as well message manipulation comparison existing algorithms.