Optical scheme for cryptographic commitments with physical unclonable keys
This addresses cryptographic security for commitments and auctions, but appears incremental as it builds on existing wavefront-shaping and detection techniques.
The authors tackled the problem of cryptographic commitments by proposing a protocol using multiple-scattering optical media as randomness sources, which can be implemented with current technology and is secure under a tamper-resistant trusted setup.
We investigate the possibility of using multiple-scattering optical media, as resources of randomness in cryptographic tasks pertaining to commitments and auctions. The proposed commitment protocol exploits standard wavefront-shaping and heterodyne-detection techniques, and can be implemented with current technology. Its security is discussed in the framework of a tamper-resistant trusted setup.