2013 Yahoo Security Breach Affected All 3 Billion Accounts

Yahoo has confirmed that back in 2013, all accounts were compromised. They initially stated that "only" 1 billion accounts were hacked, but after doing a bit more digging (and being honest with themselves) they admitted that every account was compromised. They claim that passwords were not stolen in clear text, but hashed passwords, phone numbers, birthdays, security questions and answers and more were all taken. I think if they were really honest, they'd admit they knew this years ago - and not just suddenly four years later.

Yahoo today announced that the huge data breach in August 2013 affected every user on its service - that’s all three billion user accounts and up from the initial one billion figure Yahoo initially reported. Since disclosing the hack, Yahoo continued to add more numbers of accounts compromised, but today’s announcement makes it clear that if you had a Yahoo email account, you were part of the breach.

Source: TheVerge