A Fault-Tolerant Emergency-Aware Access Control Scheme for Cyber-Physical Systems

TL;DR

This paper introduces FEAC, a fault-tolerant, emergency-aware access control scheme for cyber-physical systems that adaptively manages permissions and responses during emergencies to ensure system safety and reliability.

Contribution

The paper proposes FEAC, a novel access control scheme that integrates emergency management, dependency modeling, and fault-tolerance for CPS security and resilience.

Findings

FEAC effectively manages emergencies in CPS.

The PD-AGM model optimizes emergency response actions.

Case study demonstrates FEAC's effectiveness in hospital systems.

Abstract

Access control is an issue of paramount importance in cyber-physical systems (CPS). In this paper, an access control scheme, namely FEAC, is presented for CPS. FEAC can not only provide the ability to control access to data in normal situations, but also adaptively assign emergency-role and permissions to specific subjects and inform subjects without explicit access requests to handle emergency situations in a proactive manner. In FEAC, emergency-group and emergency-dependency are introduced. Emergencies are processed in sequence within the group and in parallel among groups. A priority and dependency model called PD-AGM is used to select optimal response-action execution path aiming to eliminate all emergencies that occurred within the system. Fault-tolerant access control polices are used to address failure in emergency management. A case study of the hospital medical care application shows the effectiveness of FEAC.