You realise you can just look this stuff up? https://en.wikipedia.org/wiki/Punktf%C3%B6rmige_Zugbeeinflus...

Crusade against Wikipedia that the information is stupendously risky if you think that's a good use of your time.

Yes, I do realize that. The fact that other parties are irresponsible is no reason to join in.

How irresponsible of (gasp) European Commision to publish the exact specification (frequencies and timings of the tones) of the command used in this attack (in Poland):

https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ:L...

(p. L 342/109-110, or ^F RADIOSTOP)

This is Official Journal, available in all EU languages (at the time).

This is well documented in each railway publication.

Also the risk is .... not existent. To damage railway infrastructure there are way more efficient and simple ways (getting a rail to derail, destroy some signaling cables, ...)

The "attack" here would require quite some investment in equipment (power etc.) and only bring a single train to a realtively quick stop, well in safe margins, where the driver after a quick check with the dispatcher can override and continue the ride, while investigators would collect the equipment.

It's impractical for a stunt (way simpler and more effective: just walk close to the tracks and they will do emergency stops for all trains close by) and ineffective for an attack.

Yes, there are other ways to bring trains to a halt or to derail them. Even so I think it is irresponsible to spread such information further than it has to go, especially on a site called 'hacker news', and even more so in a thread where people are openly arguing that insecure systems should be replaced by more secure ones. Rail infra is not as easy to update as your average web based project and keeping such information out of the hands of would-be experimenters can only be good. No downside, possible upside: easy decision.