Data Integrity Mechanisms for LPWAN Systems

Overview

Low-Power Wide-Area Networks (LPWANs) are designed for energy efficiency and long-range communication, often operating under strict payload size and bandwidth limitations. These constraints can make conventional integrity and authentication mechanisms costly or impractical for certain applications. This project investigated lightweight watermarking techniques as an alternative approach for detecting data manipulation while preserving the low-overhead characteristics of LPWAN communication.

Several watermarking concepts were designed, implemented, and evaluated, including approaches embedded directly within application data as well as techniques based on communication timing characteristics. The proposed methods were assessed through simulation and validated experimentally using LoRaWAN systems. The results demonstrated that watermarking can provide an additional layer of tamper detection with minimal impact on network resources, making it a promising option for resource-constrained IoT deployments.

Key Contributions:

• Research and development of lightweight data integrity concepts for LPWAN environments
• Design and implementation of multiple watermarking approaches for tamper detection
• In-band watermarking integrated directly into transmitted payload data
• Out-of-band watermarking based on controlled transmission interval variations
• Simulation-based evaluation of detection performance and communication overhead
• Experimental validation using LoRaWAN networks and end devices
• Investigation of trade-offs between integrity assurance, bandwidth consumption, and system complexity