Place your encrypted .3ds or .cia ROMs into the same folder as the decryptor executable. Run the batch script.
Paste your legally dumped cryptographic keys into this document. The formatting inside the text document generally follows this structure:
You are here because you want to play Pokémon, Zelda, or Mario on your PC. The keystxt error is a tolerable hurdle.
Once the script finishes, you will find a newly generated aes_keys.txt file located in your sd:/gm9/ folder. Method B: Downloading the aes_keys.txt File
If you own a physical 3DS console, you can legally "dump" your own keys using custom firmware (CFW) on your console and a tool like boot9strap or DumpKeys . However, this is an advanced process. While many users download pre-dumped keys from the internet, be aware that this technically exists in a legal grey area. This guide is intended for users who have lost their keys or are trying to back up their legally owned games. citra aes keystxt download fix
Open the file using a standard text editor (like Notepad on Windows or TextEdit on Mac).
You followed every step. The aes_keys.txt is in the sysdata/aes folder. Citra still says "Missing AES keys." Here is the diagnostic checklist:
There are open-source community tools available online, such as "Batch CIA 3DS Decryptor." You simply place your encrypted game file into the tool's folder, run the application, and it generates a completely decrypted version of the game that plays instantly on any version of Citra. A Note on Safe Downloading
This is the safest, most reliable method. It requires a real 3DS (any model: Old, New, 2DS, or 3DS XL). Place your encrypted
Downloading the key is useless if you put it in the wrong folder. Citra is very picky about file location.
By following the steps outlined in this guide—dumping your keys, placing them in the correct sysdata folder, and validating the file's content—you can overcome this common hurdle. With this fix applied, you can move past the errors and focus on what truly matters: enjoying the incredible library of 3DS games.
You cannot find a direct download because emulator developers deliberately avoid distributing copyrighted keys. Many YouTube tutorials point to dead links (RapidGator, Zippyshare) because those files get DMCA takedowns daily.
Press the button to open the action menu, select Scripts , and choose DumpKeys . The formatting inside the text document generally follows
If you do not have the file, you can create a blank document named aes_keys.txt inside the sysdata folder.
Alternative Solution: Converting Encrypted ROMs to Decrypted
Instead of managing key files, you can use pre-decrypted ROMs. These files do not require an aes_keys.txt file to run.
If you have placed the file in the directory but still receive the error, double-check these common pitfalls:
Save this .gm9 script directly into the sd:/gm9/scripts/ folder on your 3DS SD card.