Researchers Say New Attack Could Take Down the European Power Grid

An anonymous reader quotes a report from Ars Technica: Late last month, researchers revealed a finding that's likely to shock some people and confirm the low expectations of others: Renewable energy facilities throughout Central Europe use unencrypted radio signals to receive commands to feed or ditch power into or from the grid that serves some 450 million people throughout the continent. Fabian Braunlein and Luca Melette stumbled on their discovery largely by accident while working on what they thought would be a much different sort of hacking project. After observing a radio receiver on the streetlight poles throughout Berlin, they got to wondering: Would it be possible for someone with a central transmitter to control them en masse, and if so, could they create a city-wide light installation along the lines of Project Blinkenlights?

The first Project Blinkenlights iteration occurred in 2001 in Berlin, when the lights inside a large building were synchronized to turn on and off to give the appearance of a giant, low-resolution monochrome computer screen. The researchers, who presented their work last month at the 38th Chaos Communication Congress in Hamburg, Germany, wondered if they could control streetlights in Berlin to create a city-wide version, though they acknowledged it would likely be viewable only from high altitudes. They didn't know then, but their project was about to undergo a major transformation.

After an extensive and painstaking reverse-engineering process that took about a year, Braunlein and Melette learned that they could indeed control the streetlights simply by replaying legitimate messages they observed being sent over the air previously. They then learned something more surprising — the very same system for controlling Berlin's lights was used throughout Central Europe to control other regional infrastructure, including switches that regulate the amount of power renewable electric generation facilities feed into the grid. Collectively, the facilities could generate as much as 40 gigawatts in Germany alone, the researchers estimate. In addition, they estimate that in Germany, 20 GW of loads such as heat pumps and wall boxes are controlled via those receivers. That adds up to 60 GW that might be controllable through radio signals anyone can send.

When Braunlein and Melette realized how much power was controlled, they wondered how much damage might result from rogue messages sent simultaneously to multiple power facilities in strategically designed sequences and times of day. By their calculation, an optimally crafted series of messages sent under certain conditions would be enough to bring down the entire European grid. The grid security experts Ars talked to for this story said they're doubtful of the assessment. 'A sudden deficit of 60 GW will definitely lead to a brownout because 60 GW is far more than [the] reserves available,' said Albert Moser, a RWTH Aachen professor with expertise in power grids. 'A sudden deficit of 60 GW could even lead to a blackout due to the very steep fall of frequency that likely cannot be handled fast enough by underfrequency relays (load shedding).' He wasn't able to confirm that 60 GW of generation/load is controlled by radio signals or that security measures for Radio Ripple Control are insufficient.

Jan Hoff, a grid security expert, was also doubtful there'd be enough electricity dropped quickly enough to cause a brownout. 'He likened the grid to the roly-poly toys from the 1970s, which were built to be knocked around but not fall over,' said Ars.

Read more of this story at Slashdot.