Download Fix Updated: Citra Aes Keystxt
Yes, placing a boot9.bin file (dumped from your own console) in the sysdata folder is an alternative method that also works for decryption and is considered legal if it's from your own device.
To understand the fix, you must understand the problem. citra aes keystxt download fix
If you legally dump your own cartridges, you can using GodMode9 on a 3DS, producing a .3ds file that Citra can run without aes_keys.txt . Yes, placing a boot9