Cryptography and Authentication Placement to Provide Secure Channel for SCADA Communication

Supervisory Control and Data Acquisition (SCADA) systems are real-time process controlsystems that are widely deployed throughout critical infrastructure sectors including power, gas,oil, railroads and water. . However, little attention is given to security considerations in the initialdesign and deployment of these systems, which has caused an urgent need to upgrade existingsystems to withstand unauthorized intrusions potentially leading to communication attacks [1].The current paper take a Hybrid-based Cryptography (combination of Symmetric AES andAsymmetric RSA) solution to enable confidentiality and authentication placed at each end ofSCADA communication and provides secure channel for communication between MasterTerminal Unit (MTU) to Remote Terminal Units (RTUs) and/or RTUs to MTU.