Cryptojacking, which exploded in popularity this fall, has an ostensibly worthy goal: Use an untapped resource to create an alternative revenue stream for games or media sites, and reduce reliance on ads. It works by embedding a JavaScript component in a website that can leverage a visiting device's processing power to mine a cryptocurrency (usually Monero). Each visitor might only do a tiny bit of mining while they're there, every user lending some hash power over time can generate real money.

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Not so long ago, the internet often felt like a fully detached realm of ephemeral fun. Today, we wake up to tweets from a president that seem intended to goad a rogue state into nuclear war. Hackers launch ransomware worms that tear across the globe in a matter of hours, paralyzing massive multinational infrastructure companies.

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Perhaps you've been hearing strange sounds in your home—ghostly creaks and moans, random Rick Astley tunes, Alexa commands issued in someone else's voice. If so, you haven't necessarily lost your mind. Instead, if you own one of a few models of internet-connected speaker and you've been careless with your network settings, you might be one of thousands of people whose Sonos or Bose devices have been left wide open to audio hijacking by hackers around the world.

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In 2013, former National Security Agency contractor Edward Snowden famously brought to light a series of classified US government spying programs. For the first time, the American people learned that the NSA was collecting millions of their phone calls and electronic communications—emails, Facebook messages, texts, browsing histories—all without a warrant. Several of the programs Snowden revealed are authorized under Section 702 of the Foreign Intelligence Surveillance Amendments Act.

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Seven months after the WannaCry ransomware ripped across the internet in one of the most damaging hacking operations of all time, the US government has pinned that digital epidemic on North Korea. And while cybersecurity researchers have suspected North Korea's involvement from the start, the Trump administration intends the official charges to carry new diplomatic weight, showing the world that no one can launch reckless cyberattacks with impunity.

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Happy holidays from your security news friends! As a special gift, we got you this analysis of the Resistance’s tactical shortcomings in The Last Jedi. And so much more! The US this week officially pinned this year’s devastating WannaCry ransomware attack on North Korea, after the security community had largely come to that same conclusion months ago.

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In the early bitcoin years, proponents promised that you would soon be able to pay for anything and everything with cryptocurrency. Order pizza! Buy Etsy trinkets! Use a bitcoin ATM! While PayPal had existed for more than a decade, frictionless, social payment platforms like Venmo were just first taking off, and cryptocurrency seemed like a legitimate way for digital transactions to evolve. It didn't happen.

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Your digital security, any sufficiently paranoid person will remind you, is only as good as your physical security. The world's most sensitive users of technology, like dissidents, activists, or journalists in repressive regimes, have to fear not just hacking and online surveillance, but the reality that police, intelligence agents, or other intruders can simply break into your home, office, or hotel room.

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As a fourth year medical student at Yale, Matthew Erlendson says he had to think long and hard about whether to participate in a recent hackathon at the Department of Health and Human services. The two-day event seemed like an innovative way to confront the opioid crisis, which kills more than 90 people in the US every day.

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Tech giants love to tout how good their computers are at identifying what’s depicted in a photograph. In 2015, deep learning algorithms designed by Google, Microsoft, and China’s Baidu superseded humans at the task, at least initially. This week, Facebook announced that its facial-recognition technology is now smart enough to identify a photo of you, even if you’re not tagged in it.

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