https://twitter.com/stephentotilo/status/1762576284817768457/
"NEW: Nintendo is suing the creators of popular Switch emulator Yuzu, saying their tech illegally circumvents Nintendo’s software encryption and facilitates piracy. Seeks damages for alleged violations and a shutdown of the emulator.
Notes 1 million copies of Tears of the Kingdom downloaded prior to game’s release; says Yuzu’s Patreon support doubled during that time. Basically arguing that that is proof that Yuzu’s business model helps piracy flourish."
That’s not really enough to be not in violation. For example, vlc can’t natively decrypt blurays. This is because both its not bundled with the decryption library nor the decryption keys. Vlc out of the box can not decrypt blurays.
If yuzu can, if you provide some keys, eh that might be enough for them to win. It’s certainly not enough to push nintendo away. You unfortunately need to be extremely careful around the dmca stuff.
It really depends on the kind of encryption being used. I’m pretty sure if it’s a common algorithm that logic does not stand.