Quantum-secure authentication of a physical unclonable key

摘要: Authentication of persons and objects is a crucial aspect security. We experimentally demonstrate quantum-secure authentication (QSA) classical multiple-scattering key. The key authenticated by illuminating it with light pulse containing fewer photons than spatial degrees freedom verifying the shape reflected light. Quantum-physical principles forbid an attacker to fully characterize incident pulse. Therefore, he cannot emulate digitally constructing expected optical response, even if all information about publicly known. QSA uses that be copied due technological limitations against digital emulation. Moreover, does not depend on secrecy stored data, unproven mathematical assumptions, straightforward implement current technology.