Hackers are passing around a mega-leak of 2.2 billion records

WHEN HACKERS BREACHED companies like Dropbox and LinkedIn in recent years—stealing 71 and 117 million passwords, respectively—they at least had the decency to exploit those stolen credentials in secret, or sell them for thousands of dollars on the dark web. Now, it seems, someone has cobbled together those breached databases and many more into a gargantuan, unprecedented collection of 2.2 billion unique usernames and associated passwords, and is freely distributing them on hacker forums and torrents, throwing out the private data of a significant fraction of humanity like last year’s phone book.