Discovering Advanced Decryption Key locations in The Outer Worlds 2 is vital if you want to enjoy the game's best weapons and best armor. While you can find a selection of unique gear by exploring and completing quests, the best ones are sealed in High Security Lockboxes; containers which require Advanced Decryption Keys to open.
Once you've collected a lockbox containing an item you like the look of (you can view them all in the hold of your ship), you'll need enough keys to unseal it. Usually, they each cost about four to eight keys to open, depending on how good the item is, so you'll want to grab all you can while out and about.
