If you want to permanently decrypt an ISO to a "folder format" or a decrypted ISO, you can use tools like PS3Dec or PS3 Quick Disc Decryptor .
On a practical level, the DKEY had a small LED that would turn green when the exploit was active and red when it was in "stealth mode" (hiding from Sony’s syscalls). For teenagers trying to play Call of Duty: Black Ops online without a console ban, that little LED was a lifeline.
The D-Key was killed by and later models’ bootrom security.
The D-Key, also known as the directional key or D-pad, is a crucial component of the PlayStation 3 (PS3) controller. It allows users to navigate through menus, control characters, and interact with games in various ways.