Hackers have released a custom firmware which allows compromised consoles to log into PSN, alongside LV0 decryption keys which allow the user to bypass future security updates. The information also came into the hands of another Chinese hacking group called BlueDiskCFW which was about to release the Iv0 keys for a fee. To avoid others earning money with their hack, The Three Musketeers decided to publish the keys themselves. The team of hackers released the following announcement: “As this was a group effort, we wouldn’t normally have lost a word about it ever”
Source: https://thehackernews.com/2012/10/sony-playstation-3-hacked-with-custom.html