2014 Yahoo Security Breach, 500 Million User Accounts Stolen

by Tech Mainstream Staff


September 23, 2016



Yahoo recently determined that 500 million user accounts have been stolen from the "company's network" and users who have not changed their passwords since late 2014 should do so now. It is considered the largest data breach ever recorded.

The following official statement defines the details of the huge breach: "A recent investigation by Yahoo! Inc. (YHOO) has confirmed that a copy of certain user account information was stolen from the company’s network in late 2014 by what it believes is a state-sponsored actor.

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.

The ongoing investigation suggests that stolen information did not include unprotected passwords, payment card data, or bank account information; payment card data and bank account information are not stored in the system that the investigation has found to be affected.

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’s network. Yahoo is working closely with law enforcement on this matter."

 

 

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