Designing accountable IoT systems to overcome IoT storage limitation

IoT devices have been widely used in diverse environments, bringing more and more benefits to people. However, the security issues surrounding these IoT devices raise significant concerns about their level of security. Researchers have proposed many prevention and detection methods for security issues. However, these methods may only partially address the challenges of IoT devices. Accountability can be used as an additional method to enhance security, which is vital in improving security. This article proposes robust accountability methods for IoT devices lacking permanent storage to ensure accountability. We prove that our proposed accountability methods successfully achieve completeness, correctness, and accuracy. To assess their effectiveness, we integrate our accountability methods into a temperature humidity monitor, revealing that the overhead incurred by these methods showcases their practical applicability with a reasonable impact on performance.