Hacker News Reader

As the gruq discussed in his keynote at HITB-HKT a few days ago, one can make the argument that the "train system" was hacked: Simple mechanisms were used to bring the whole system down.

The sequence of tones to influence telephone switchboards were known as well. It was the origin of hacking. This may be an easy hack, but it still is one.

BTW, it's good that attention is being called to it. There is a bit of tension in the region, as you may know, and opponents are not going to play nice. That also makes me suspect this was not a malicious attack.

Not even that. Trains in Poland are generally using analog radio, if you go on frequency, which you can find publically, or just scan for it and say [specific phrase which you can find on Wikipedia] five times, that's the equivalent of playing the recording. All train operators who will hear that must stop immediately.