1 Correction to: Quantum Information Processing (2018) 17: 231 https://doi.org/10.1007/s11128-018-1991-x

A measurement-device-independent quantum key distribution (MDI-QKD) scheme with passive heralded single-photon sources has previously been published [1], while the two-intensity MDI-QKD scheme with a two-mode source proposed in our paper can been regarded as the extension and further research of the work [1].

This work should have been cited in our paper, and we would like to thank Qin Wang for bringing this important work to our attention.