Getting something out of nothing in the measurement-device-independent quantum key distribution Yong-Gang Tan, Qing-Yu Cai, Hai-Feng Yang and Yao-Hua Hu Eur. Phys. J. D, 69 11 (2015) 258 Published online: 19 November 2015 DOI: 10.1140/epjd/e2015-60341-y