Shih-Alley entanglement generation in physical unclonable keys

Secure communication is of crucial importance for many applications. Currently communication security is based on encryption protocols which are computationally hard to crack by classical computers. However, it is generally believed that quantum computers will be able to decipher these encryption methods. Quantum communication has to potential to solve this threat, but it is vulnerable to man-in-the-middle attacks. Recently, Goorden et al. proposed a scheme which uses a multiple-scattering key as an authentication device, which solves the man-in-the-middle threat.[1] As a next step towards secure quantum communication we propose a Shih-Alley type of entanglement generation in such a scattering key.[2] This would enable us to develop a one-sided device-independent communication protocol. We report on the latest developments in this experiment. [1] S.A. Goorden et al., Optica 1, 421-424 (2014) [2] Y.H. Shih et al., Phys. Rev. Lett. 61, 2921 (1988