FTA: > The saboteurs reportedly interspersed the commands they used to stop the trains with the Russian national anthem and parts of a speech by Russian presid

FTA: > The saboteurs reportedly interspersed the commands they used to stop the trains with the Russian national anthem and parts of a speech by Russian president Vladimir Putin. > The only real limitation of the train-paralyzing radio attack, Olejnik says, would be that the saboteurs would have to be relatively close to the target trains—somewhere from hundreds of feet to miles, depending on the power of the radio equipment used in their disruption operation. [...] Given that the disruptions appear to have occurred in three different Polish administrative regions across the country, getting that equipment close enough to all the target trains would likely have been the biggest challenge for the saboteurs. So it was a coordinated attack. This could really turn into a DoS vector against the railway system - if I extrapolate from Germany there should be enough Z-Zombies in Poland that it's a real danger. If it isn't even done by FSB or GRU but considering that all you need an antenna, a USB-SDR? and a notebook this could get really ugly.