Security Issues in SCADA Systems

Supervisoiy Control and Data Acquisition (SCADA) networks control critical infrastructure of many countries. They perform vital functions for utility companies including electricity, natural gas, oil, water, sewage, an d railroads. The SCADA networks can he easy targets for unauthorized intrusions that can result in devastating attack s by terrorists. This research identifies threats faced by SCADA and investigates cost-efficient methods to enhance its security in the light of DNP3 protocols, which h as b eco m e a d e fa c to industry standard protocol for implementing the SCADA technology. We propose cost-effective implementation alternativesincluding SSL/TLS, IPsec, object security, encryption, and message authentication object. The paper evaluates implementation details of the se solutions, and analyzes and com pares these approaches. Finally, we provide new research directions to m ore adequately secure SCADA networks an d the protocols over the long term.