Massive Yahoo hack is the world's biggest -- for now
When Yahoo said on Thursday that data from at least 500 million user accounts had been hacked, it wasn't just admitting to a huge failing in data security -- it was admitting to the biggest hack the world has ever seen.
Until Thursday, the previous largest known hack was the 2008 breach that hit almost 360 million MySpace accounts, according to a ranking by the "Have I been pwned" website. Like the Yahoo breach, the hack was only publicly disclosed this year after data was offered on a hacker forum.
And only three breaches had ranked above the 100 million level:
LinkedIn reported a loss of 167 million email addresses and passwords. They were originally stolen in 2012 but not publicly disclosed until 2016, again after the data was offered on an underground "dark market" site.
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