Aes-keys.txt: Citra

If you are still using an archived version of Citra (build 2052 or earlier), here is how to install the key file:

Step 1: Locate your Citra User Directory.

Step 2: Inside that folder, navigate to sysdata (create the folder if it doesn’t exist).

Step 3: Place your aes-keys.txt file inside /sysdata/. Citra Aes-keys.txt

Step 4: Restart Citra. Go to File → Load File and select your encrypted ROM.

Troubleshooting:

For Citra to run games that are encrypted, it needs access to these AES keys. Without them, Citra cannot properly decrypt the game data, and the game may not launch or may behave erratically. The keys are specific to each game and are usually derived from the game's own data or extracted from the 3DS system. If you are still using an archived version

Critical Legal Warning: Do not ask for or share aes-keys.txt that contains console-unique keys (like movable.sed). The keys themselves are not copyrighted code, but obtaining them from a console you do not own may violate DMCA anti-circumvention laws.

Here are the three legitimate methods:

The "Aes-keys.txt" file often becomes relevant in discussions about emulation and game decryption. The Nintendo 3DS uses various forms of encryption to protect its games. The AES (Advanced Encryption Standard) keys are crucial for decrypting and playing 3DS games. Step 2: Inside that folder, navigate to sysdata

Before Citra’s takedown, tools like Citra Automatic Build Updater could fetch public keys. Now, manual sourcing is required. Do not download pre-made files from YouTube descriptions or random forums – they often contain malware.

As of 2025, Azahar (the fork that replaced Citra) has a modernized key handling system. Instead of aes-keys.txt, Azahar uses a keys.txt file placed in [User Folder]/load/. You can generate this via the Azahar Key Generator tool, which asks you to input data from your own 3DS.

What has changed with Azahar?

If you own a hacked Nintendo 3DS, you can extract the exact keys your console uses.