IEEE 1711.1-2025

This standard defines a cryptographic protocol to provide integrity and optional confidentiality for cybersecurity of substation serial links. It does not address specific applications or hardware implementations, and is independent of the underlying communications protocol.

The elevated concern of cybersecurity throughout the power industry has created a need to protect communications to and from substations. This trial-use standard defines a cryptographic protocol known as SCADA Serial Protection Protocol (SSPP) that can protect the integrity and optional confidentiality of asynchronous serial communications typically used by substation equipment. SSPP is primarily intended to protect serial SCADA communications, but can be applied to other serial communications--such as the maintenance ports of intelligent electronic devices (IEDs). SSPP is largely independent of the underlying communications link and protocol (e.g., Distributed Network Protocol 3 [DNP3]), and is appropriate for serial communications over leased lines, dial-up lines, multi-drop links, radio, power line carrier, fiber optic, etc. SSPP is suitable for implementation in new equipment or for deployment in bump-in-the-wire devices retrofitting protection to existing systems.

New IEEE Standard - Active. A cryptographic protocol to provide integrity and optional confidentiality for cybersecurity of serial links is defined in this standard. Specific applications or hardware implementations are not addressed, and the standard is independent of the underlying communications protocol.