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Yahoo is expected to confirm a massive data breach, impacting hundreds of millions of users

Recode:

But there’s nothing smooth about this hack, said sources, which became known in August when an infamous cybercriminal named “Peace” claimed on a website that he was selling credentials of 200 million Yahoo users from 2012 on the dark web for just over $1,800. The data allegedly included user names, easily decrypted passwords and personal information like birth dates and other email addresses.

It will be curious (and worrying) to see whether this was a one-off breach or persistent. And, if persistent, whether the data also includes information from users of services like Tumblr.