Protocols Built for a Trusting World: IEC 62351 Power-System Security, Part One — the Parts Map, Securing IEC 61850 GOOSE and MMS, and IEC 60870-5-104

Deep End Era. Engineering with Sankalp · Oct 28, 2026 · 58m

Amira Saleh, the Al Sahil electrical lead, and Sven Lindqvist, the protection and control engineer, try to sign a GOOSE trip message in less than four milliseconds, and discover why key management is the hard part. Part three of The Deep End's IT and OT security series.

Chapters

00:00:00 Cold open: the relay room

00:07:34 Born trusting: why the protocols were insecure

00:13:53 Part 3: the TLS profile

00:18:54 Keys, codes and replays

00:22:25 Part 4: securing MMS

00:25:38 Parts 6 and 9: GOOSE and group keys

00:32:47 Time as a security asset

00:35:14 Part 5: securing 104

00:40:33 The solar farm…