: Citra is an open-source emulator for the Nintendo 3DS. It allows users to play 3DS games on their computers. The "portable" version likely refers to a version of Citra that can be run from a portable device, like a USB drive, without requiring installation on the host computer.
Ensure you have the boot9 key and movable.sed key included. Some users also need to enable "Enable Hardware Shader" and disable "Accurate Multiplication" in Graphics settings, but that is unrelated to AES keys. aeskeystxt citra portable