Limitations of Practical Quantum Cryptography

By Vibha Ojha, Anand Sharma, V. Goar, P. Trivedi. 2011

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On‐chip single photon sources using planar photonic crystals and single quantum dots (2010, background): “Therefore, there may be no photons, several photons, or many photons, since the photon number generated is subject to Poissonian statistics; this can be problematic for a number of applications such as quantum cryptography because of possible photon number-splitting attacks (“eavesdropping”) [6, 7].”
Micius quantum experiments in space (2022, background): “For example, the photonnumber-splitting (PNS) attack (Brassard et al., 2000; Rev. Mod.”
Feasibility of satellite quantum key distribution (2009, background): “She can split a photon from the multiphoton pulse, store it and measure it in the correct basis after Alice and Bob have pubblicly announced their bases.”