Four Kinds of Box: IEC 62443-4-2 Technical Security Requirements for IACS Components

Deep End Era. Engineering with Sankalp · Oct 28, 2026 · 1h 1m

Rafa Ortega and Tomás Herrera run the train five integration lab, where every component bound for the safety and control zones is unboxed, tested against its 4-2 claims and either accepted or sent back. Along the way: a switch with a hidden serial port, a controller that would not boot an unsigned image, a historian whose certificate did not cover the version delivered, and a spreadsheet with 236 rows. Part twelve of The Deep End's 62443 series.

Chapters

00:00:00 Cold open: the port behind the label

00:03:59 Why components need their own standard

00:05:43 The four kinds of box

00:08:56 The…