Not sure how it will survive extrusion. But yeah, the wire is a cylinder so you can ‘imprint’ multple ‘sides’. Another idea, some form of anti temper encryption

Not sure how it will survive extrusion. But yeah, the wire is a cylinder so you can ‘imprint’ multple ‘sides’. Another idea, some form of anti temper encryption like little particles (flock) inside the filament (like those colored rice anti temper methods)