DevHacker Noonabout 4 hours ago
IEC 61850 Security: MMS, GOOSE, Sampled Values
18 min read
IEC 61850 is an ecosystem of communication models, not a single protocol. MMS runs over TCP/102, while GOOSE and Sampled Values operate directly over Ethernet. A properly constructed control operation altered simulated state without authentication, and manipulating quality metadata influenced downstream interpretation.
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