These are global system keys unique to the hardware platform. Emulators require this text file to decrypt Nintendo Switch game cartridges, digital eShop titles, and the system firmware.
This is the most frequent reason. Every Nintendo Switch firmware update introduces new encryption keys. Your prod.keys file will become obsolete for newer games if it was dumped from an older firmware version. The file must be dumped from a console running the .
cp keys.dat keys.dat.backup # Linux copy keys.dat keys.dat.backup # Windows CMD
Knowing their purpose and origin can significantly narrow down how to verify their correctness.
This is the core of the matter. Emulators are precise instruments. They require the exact key that matches the encryption used by the game. Nintendo doesn't use a single, static key for everything. Instead, the keys are tied to the system's firmware version.
: If these keys are supposed to integrate with a larger system or platform, test their use within that context. If they fail to work as expected, there might be an issue with their correctness.
file is usually around 7-12 KB. If yours is 0 KB or significantly smaller, the dump was likely unsuccessful. Run as Administrator
To ensure your keys are "correct" for your setup, verify the following: Firmware Version Match