Quantum effect based PUFs using IR lasers would be really neat for things like authentication tags. A provably unclonable key would be incredibly useful, especi

Quantum effect based PUFs using IR lasers would be really neat for things like authentication tags. A provably unclonable key would be incredibly useful, especially if it doesn't need contact. There's also QKD variants based on mutual access to PUFs, using the PUF as the equivalent to a signing keypair in a key exchange. QKD in general might be pretty redundant, but that particular use would certainly have its niches.