The file is a plain-text document containing a list of hex codes. These codes include:
Standard .3ds or .cia files that haven't been pre-decrypted. 3ds aes-keys.txt
Older versions of the Citra 3DS emulator (before the decryption requirement was relaxed) required you to place aes_keys.txt in the Citra sysdata folder. Without it, Citra would show a black screen or a decryption error when you tried to load a .3ds file. The file is a plain-text document containing a
A final, critical warning:
: Data for Miis, StreetPass, and amiibo encryption. How to Obtain the Keys Without it, Citra would show a black screen
: While some users choose to manually decrypt their ROMs using batch tools, many emulators use the aes_keys.txt file to decrypt games as they are being loaded.
: It consists of labels followed by 32-character hexadecimal keys (e.g.,