Yahoo released an important message security for its users on the company's official blog a while ago confirming that they have been hacked information for at least 500 million Yahoo accounts at the end of 2014.
The company believes that the hackers behind the attack it was from some government agency without naming the state. According to the company's blog post, names, email addresses, phone numbers, dates of birth, hashed passwords, and in some cases encrypted or unencrypted security questions and answers have been leaked.
Yahoo he says that there is no evidence that leaked payment card data, bank account details, or other financial information have leaked.
With base the research that is still in development, Yahoo believes that the leaked information concerns at least 500 million user accounts.
The investigation has not revealed evidence that hackers are still in their networks today.
Yahoo, as the publication says, continues to work closely with law enforcement authorities and plans to inform all users affected by the attack.
Everyone who has a Yahoo account, change your password immediately (though it would be best to change your company) from the following page:
Read the PDF with the information and the announcement of hack and data leak: