Patently false.

If I have access to a mill and pictures of some "high security key", sans magnets and other types of active mechanisms, I can duplicate that key.

It may be difficult, but subtractive method still works. A subtractive method is what is used when you go from blank to key.

What is new here is someone can print a plastic key. Cool. with PLA and a rubber vacuum set, I can cast any amount of iron blanks of said 'secure keys'.