Passwords exposed

Millions of Facebook passwords exposed internally

Security researcher Brian Krebs broke the news about data protection failures, which saw up to 600 million passwords stored in plain text.

The passwords that were exposed could date back to 2012, he said.

In a statement, Facebook said it had now resolved a "glitch" that had stored the passwords on its internal network.

In a detailed expose, Mr Krebs said a Facebook source had told him about "security failures" that had let developers create applications that logged and stored the passwords without encrypting them.