I don't see why not... You can trademark or copyright a sequence of letters and numbers (i.e. a name, a title, a story or a book) or a sequence of musical notes (i.e. music)... Why not a specific sequence of alphanumeric characters that happens to be an encryption key?
Mark
The code lacks the minimal amount of original creative expression needed for copyright.
“Why not a specific sequence of alphanumeric characters that happens to be an encryption key?”
Because the encryption key is nothing but a number. An integer, to be exact, albeit a rather lengthy one. Speaking of which, has anyone managed to convert this string to a decimal integer, yet. I gave it a quick try with Windows calculator and some online converters, but none of them support enough digits to do it.