Modification often depends on the specific hardware revision of the console, as newer versions frequently include patches for known vulnerabilities. Custom Firmware:
Nintendo uses a hierarchical key system stored in the Secure Monitor (TrustZone) of the Tegra X1: nintendo switch decryption keys
Legally, users are expected to "dump" these keys from their own physical Switch hardware. This requires a hackable console and homebrew software, which is a technical barrier for most casual users. The "Review" Verdict Utility Modification often depends on the specific hardware revision
Nintendo actively takes legal action against tools and websites that facilitate the unauthorized distribution or extraction of these keys. Master Keys: If you are looking for a Parental Controls master key , this is different and can be obtained through the Nintendo Support portal Do you need help checking if your serial number is compatible for dumping these keys? The "Review" Verdict Utility Nintendo actively takes legal
Nintendo uses in their legal arguments against key extraction? Nintendo of America Inc. v. Tropic Haze LLC, 1 - Scribd