Inside the Russian hack of Yahoo: How they did it

A single click was all it took to launch one of the biggest data breaches ever

By Martyn Williams

One mistaken click. That’s all it took for hackers aligned with the Russian state security service to gain access to Yahoo’s network and potentially the email messages and private information of as many as 500 million people.

Of course, that 2014 breach, was soon dwarfed by revelations of a second breach that took place a year earlier and which at the time was said to have compromised 1 billion Yahoo user accounts. On Tuesday, Yahoo said that, in fact, all 3 billion user accounts were affected.

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