Aes-keys.txt Citra Jun 2026

When you extract a game from a cartridge (creating a .3ds or .cci file) or download a digital title ( .cia file), the data inside is still encrypted. Your PC cannot read this raw encrypted data. Citra, the emulator, cannot read it either—unless you provide it with the mathematical "key" to unlock the encryption.

is a plain text file that stores one or more cryptographic keys used by Citra to decrypt 3DS ROMs on the fly. When you load a game, Citra reads this file, finds the appropriate key for that specific game or system component, decrypts the relevant sections of the ROM, and then begins emulation. aes-keys.txt citra

It stores device-specific AES keys used to decrypt: When you extract a game from a cartridge (creating a

Decrypted ROMs actually load faster because Citra does not have to decrypt on the fly. However, they take up slightly more hard drive space. is a plain text file that stores one

However, the Nintendo 3DS is a highly secure system. Unlike older consoles like the GameBoy or NES, the 3DS utilizes complex encryption to protect its operating system and game cartridges from piracy and tampering. For an emulator like Citra to function, it must be able to read and execute this software, which brings us to the necessity of cryptographic keys.

To avoid headaches in the future, follow these rules:

This means your aes-keys.txt file is present but does not contain a specific key required by the game. You have two options: