If you used keys from 2020, newer games simply wouldn't boot.

To use SAK effectively, you need your keys placed in the same folder as the SAK.exe application:

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This file pairs with specific games to authorize and decrypt individual titles.

If you are using a set of prodkeys labeled or sourced from , the direct answer is: They are correct for games released up to 2021, but they are outdated for modern titles.

Understanding Switch Decryption Keys Switch emulation requires specific cryptographic keys to decrypt and run game files legally owned by the user. Two primary categories of files handle this process: and Titlekeys .

: SAK warns about missing master keys. Fix : Your prod.keys file is outdated. Redump your keys using the latest firmware.

In 2021, the Nintendo Switch firmware went through significant updates. Notably, firmware , and later introduced new encryption methods.

In 2021, the Nintendo Switch transitioned through Firmware versions 12.0.0 up to 13.2.1. A set of keys from 2021 matches these specific firmware levels.

If you can provide the or the tool’s full name (e.g., “Sak for Steam,” “Sak key extractor”), I can give a more specific answer about 2021 key correctness.

This is the best command for a quick health check. It tells you the Windows edition, the (last 5 characters), and the license status. Crucially, it identifies the Product Key Channel , telling you if you have a Retail, OEM, or Volume (KMS/MAK) license.