An infamous dataset of leaked login details, updated last week, now houses 9,948,575,739 passwords and poses the biggest threat to our online security ever

An image showing a rendering gold padlock against a digital background depicting technologies in security systems.

Check your passwords, people, because if there was ever a good reason to not reuse the same password, or even variants of the same password, then the latest version of the RockYou collection of leaked or stolen passwords must surely be it. With almost 10 billion unique passwords, the dataset is the largest source of genuine login details, from all around the world, making the risk of cyberattacks as high as it's ever been.

The astonishing number was reported by Cybernews (via Sweclockers) after the updated dataset was posted on a forum used by hackers. Back in 2009, social media company RockYou suffered a data breach in which 32 million user accounts were compromised. Over a decade later, in 2023, a 100 GB text file titled RockYou2021 was posted on hacking forums.