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Want to really understand how bitcoin works? Here’s a gentle primer
Enlarge (credit: The Matrix / Aurich) Update, 12/26/20: It’s the year end holiday season, and Ars staff has been enjoying some much needed downtime. While that happens, we’re resurfacing some classic Ars stories like this 2017 explainer on everything you’ve wanted to know about Bitcoin but may have been afraid to ask. (Because with the […]
The US Space Force plans to start patrolling the area around the Moon
Enlarge / The US Air Force Research Laboratory seeks to develop a satellite to patrol cislunar space. (credit: US Air Force Research Laboratory) This week, the US Air Force Research Laboratory released a video on YouTube that didn’t get much attention. But it made an announcement that is fairly significant—the US military plans to extend […]
Attackers can force Amazon Echos to hack themselves with self-issued commands
Enlarge / A group of Amazon Echo smart speakers, including Echo Studio, Echo, and Echo Dot models. (Photo by Neil Godwin/Future Publishing via Getty Images) (credit: T3 Magazine/Getty Images) Academic researchers have devised a new working exploit that commandeers Amazon Echo smart speakers and forces them to unlock doors, make phone calls and unauthorized purchases, […]