Yahoo broke the news to half-a-billion users Thursday that hackers breached its system and thus might know their passwords, security questions, phone numbers, and dates of birth. Yes, that's a "b" as in billion, making this the largest data breach ever, notes CNET. The company is blaming "state-sponsored" hackers for the 2014 breach, without offering specifics. Related coverage:
- What should users do? In addition to changing passwords and security questions, they might consider enabling two-step authentication. See Recode and USA Today for advice.