A team from the University of Twente and the Amsterdam University of Applied Sciences have published a paper demonstrating gross overbillings by smart energy meters, ranging from -32% to +582% of actual power consumption.
Ironically, the overbilling is largely an artifact of power-saving features, which introduce line-noise that confuses the meters.
Overall, five of the nine smart meters gave out readings much higher than the actual amount of power consumed, while two gave lower readings.
The greatest inaccuracies were seen when researchers combined dimmers with energy saving light bulbs and LED bulbs.
After finishing their lab experiment, researchers dismantled the smart meters to understand the problem. Following their efforts, the three-man research team discovered that smart meters which gave abnormally high readings used a Rogowski Coil in their setup, while the smart meters that gave out low readings used Hall effect-based sensors.
Static energy meter errors caused by conducted electromagnetic interference
[Frank Leferink, Cees Keyer and Anton Melentjev/IEEE Electromagnetic Compatibility](Sci-Hub mirror)
Millions of Smart Meters May Over-Inflate Readings by up to 600%
[Catalin Cimpanu/Bleeping Computer]
Of course they announced it at the end of the day on Friday, that’s what you do with bad news.
Iowa state court officials contracted with Coalfire to conduct "penetration tests" on its security; as part of those tests, two Coalfire employees broke-and-entered the Adel, Iowa courthouse, and were caught by law-enforcement, whose bosses in Dallas County were not notified of the test.
Eleanor Saitta's (previously) 2016 essay "Coercion-Resistant Design" (which is new to me) is an excellent introduction to the technical countermeasures that systems designers can employ to defeat non-technical, legal attacks: for example, the threat of prison if you don't back-door your product.
Life isn’t getting any less hectic, and pressure cookers are a quick, healthy solution for a growing number of kitchens. But if you thought your Instant Pot was versatile, there’s a major upgrade on the market: The Yedi 9-in-1 Total Package Instant Programmable Pressure Cooker. If you’ve somehow never used a pressure cooker before, try […]
When it comes to data analytics or deep learning, there’s one language behind the apps and algorithms that power the biggest companies of today: Python. The best part about this tool is that as versatile as it is, it’s actually fairly easy to learn. But mastery? For that, you need more than just a beginners’ […]
Your smartphone’s GPS is a modern necessity for some trips, but how do you use it safely? It’s been a problem ever since phones went mobile. A certain phone mount even shelled out the money for a commercial during the Big Game, so clearly there’s a market for the solution. Turns out there are a […]