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DNP3 Secure
DNP3 Secure is an enhanced, secure version of the Distributed Network Protocol used primarily for communication between SCADA systems and devices like RTUs and IEDs. It adds robust authentication and encryption features to the standard DNP3, aiming to protect critical infrastructure communications from interception and tampering..
Distributed Network Protocol version 3 (DNP3) is a widely adopted protocol in industrial automation and control systems, especially within utilities like electricity and water. The 'Secure' version introduces layered cryptographic protections to the traditional protocol, addressing the inherent security challenges of transmitting critical operational data.
DNP3 Secure incorporates measures like message authentication and data encryption to mitigate eavesdropping, spoofing, and replay attacks. It utilizes standards such as IEC 62351 to define cryptographic mechanisms, ensuring data integrity, confidentiality, and authentication between communicating devices including Remote Terminal Units (RTUs), Intelligent Electronic Devices (IEDs), and SCADA masters.
Typically, DNP3 Secure functions over TCP/IP or UDP, though this specific port (19999) might be used for proprietary or vendor-specific implementations. Its secure extensions are critical in protecting grid operation data and commands from cyber threats, promoting increased resilience within critical infrastructure.