These formats have largely superseded the need for keys.txt . The .wua format, specifically designed for Cemu, packages the game and its necessary keys into a single container. If you use this modern standard, keys.txt is effectively obsolete.
key.txt is a plain text file that contains cryptographic keys used by Cemu to decrypt Wii U game images and title data. The Wii U console uses a unique console-specific key (the "OTP" key) and common keys (like the Wii U common key) to encrypt all software. Without these keys, encrypted game dumps appear as scrambled, unreadable data. wii u keystxt for cemu
: You will often encounter an error stating, "This application is encrypted. To run this application, open keys.txt and add the disc key" . This is the emulator's way of saying it has the lock but needs the specific key you've "dumped" from your own console. How to Use keys.txt These formats have largely superseded the need for keys