An investigation by the Silicon Valley-based company has confirmed that a copy of certain user account information was stolen from the company&8217;s network in late 2014 by what it believes is a “state- sponsored” actor, the company said,
The account information may have included names, email addresses, telephone numbers, dates of birth, hashed passwords (the vast majority with bcrypt) and, in some cases, encrypted or unencrypted security questions and answers, it said.
Based on the ongoing investigation, Yahoo believes that information associated with at least 500 million user accounts was stolen and the investigation has found no evidence that the state-sponsored actor is currently in Yahoo&8217;s network. Yahoo is working closely with law enforcement on this matter, the company said.
Online intrusions and thefts by state-sponsored actors have become increasingly common across the technology industry. Yahoo and other companies have launched programs to detect and notify users when a company strongly suspects that a state-sponsored actor has targeted an account. Since the inception of Yahoo&8217;s program in December 2015, independent of the recent investigation, approximately 10,000 users have received such a notice, it said.
We understand that Yahoo is conducting an active investigation of this matter, but we otherwise have limited information and understanding of the impact. We will evaluate as the investigation continues, Verizon said.
The dark cloud this casts will be very long and will likely impact the merger agreement