This article provides a comprehensive guide to everything you need to know about the "Citra Aes Keys.txt" file, from its fundamental purpose to advanced troubleshooting.
When you load a game, the physical 3DS hardware uses its internal bootrom keys to decrypt the data on the fly. Because Citra emulates the 3DS hardware environment, it requires access to these identical cryptographic keys to read and execute encrypted game files.
This comprehensive guide explores everything you need to know about the aes_keys.txt file: what it is, why you need it, how to obtain it legally, where to place it, and the current state of 3DS emulation following the historic shutdown of the Citra emulator.
Without these keys, Citra cannot:
If you have the key values, you can create the file yourself: Open a text editor (like Notepad or TextEdit).
: If a game is completely pre-decrypted on a physical console before transferring to a PC, it will run without the keys. However, keeping a configured text file ensures all file extensions—including updates and DLC—load without issue. Legal and Sourcing Notice
For Citra to recognize the keys, the file must be named exactly aes_keys.txt and placed in the sysdata folder within your Citra user directory: Operating System C:\Users\[Your_Name]\AppData\Roaming\Citra\sysdata\ macOS ~/Library/Application Support/Citra/sysdata/ Linux ~/.local/share/citra-emu/sysdata/ Android [Citra_Root_Folder]/sysdata/ Citra Aes Keys.txt
Boot your 3DS into by holding the Start button during power-up. Navigate to [M:] MEMORY VIRTUAL . Select aeskeydb.bin . Choose AES keydb options , then select Dump keys to text . Connect your SD card to your PC. Locate the dumped text file in the /gm9/out/ folder. Rename this file to aes_keys.txt . Correct File Structure
It's important to know that you may not need every single key in this list. The specific keys required depend on what you're trying to do:
: For those using RetroDECK, developers have discussed adding better BIOS support to make it easier for users to symlink their keys into the correct path. The Future of Keys This article provides a comprehensive guide to everything
Use a file manager app to navigate to Android/data/org.citra.citra_emu/files/citra-emu/sys/ . Step 2: Create or Insert the File
These are game dumps that have already had their encryption layer removed, usually via a hacked 3DS console using tools like GodMode9. Citra can play decrypted ROMs immediately without needing an external key file. How to Legitimately Obtain 3DS AES Keys