In September, Yahoo disclosed that 500 million user accounts had been hacked. In December 2016, Yahoo announced that an additional one billion accounts had been hacked.
“What’s most troubling is that this occurred so long ago, in August 2013, and no one saw any indication of a breach occurring until law enforcement came forward,” said Jay Kaplan, the chief executive of Synack, a security company. “Yahoo has a long way to go to catch up to these threats.”
In what could be the biggest hack ever, the Yahoo user accounts included passwords, phone numbers, birth dates, and security questions.
Verizon is in the process of buying-out Yahoo. Verizon is also known for its lackadaisical cybersecurity and has had breeches of their customer data, as well.