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this post was submitted on 13 Dec 2023
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Apparently there was some kind of gps geo fencing going on - that the software detected the train went into an uncertified repair yard and bricked the thing. So I assume the hackers just purged that info, or unset the flags that denoted the brick condition so as far as the train software was concerned it was operating normally.
It's an interesting hack but there is a safety aspect to this too. A train is a complex machine that could go catastrophically wrong and kill a bunch of people. It's not quite Boeing 737 levels of safety criticality but neither is it something that should be taken lightly with regards to service procedure or parts procurement. So the manufacturer were being dicks to brick the train. But the train operator using an unauthorised repairer who might not have access to, let alone follow the correct servicing procedures or parts is not good either.