Yahoo! investigates data breach linked to Myspace and LinkedIn
Passwords and usernames have been put on sale for thousands of dollars. It is unclear whether the details that have been released are from current accounts, or from old inactive ones.
A study carried out by Motherboard initially seemed to suggest that they were active accounts, but further probing showed a high probability of the contrary.
The hacker, known as Peace, said the data was from 2012. The information is being sold for 3 bitcoins.
"Yahoo works hard to keep our users safe, and we always encourage our users to create strong passwords, or give up passwords altogether by using Yahoo Account Key, and use different passwords for different platforms," the company said in a statement.
According to a sample of the data, it contains usernames, hashed passwords (created with md5 algorithm), dates of birth, and in some cases back-up email addresses. ■