Which is probably not copyrightable. A key is just a number, and copyright only applies to creative works. In a court, Nintendo would have to argue that copyright does apply because the key was created via some artistic or creative process by a human. It likely is just the output of a random number generator. Also, we’ve already been through this when people figure out how to decrypt DVDs.
What proprietary code did they have?
Stupidly, the decryption key.
Which is probably not copyrightable. A key is just a number, and copyright only applies to creative works. In a court, Nintendo would have to argue that copyright does apply because the key was created via some artistic or creative process by a human. It likely is just the output of a random number generator. Also, we’ve already been through this when people figure out how to decrypt DVDs.