Energy-Aware ICS Cybersecurity Gap Assessment Guide (NIST SP 800-82 + IEC 62443)

This guide bridges two critical domains: industrial cybersecurity and energy-aware system design. While NIST SP 800-82 provides foundational threat modeling, security architecture patterns, and lifecycle-based risk management tailored to ICS environments (e.g., SCADA, DCS, PLCs), and IEC 62443 establishes a tiered, zone-and-conduit-based security lifecycle with technical requirements (e.g., secure by design, secure development, patch management), the Energy-Aware extension introduces energy as a first-class constraint in security assessment. It defines metrics such as energy overhead of cryptographic operations, power profile deviations during intrusion detection, and thermal impact of redundant security services—enabling quantification of how security controls affect real-time energy budgets in edge controllers, smart sensors, or battery-powered field devices. The methodology includes an augmented gap analysis matrix that cross-references IEC 62443 security levels (SL-0 to SL-4) and NIST control families (e.g., IA, AC, SI) against energy-aware criteria—including dynamic voltage/frequency scaling (DVFS) compatibility, low-power mode resilience, and energy-efficient authentication protocols (e.g., ECC over RSA). Applications span microgrids, remote oil & gas telemetry, and distributed renewable generation systems where compute, communication, and storage resources are tightly constrained—and where traditional security implementations may exceed allowable power envelopes or trigger thermal shutdowns.