Quantum cryptography and its certification against attacks
I briefly explain quantum cryptography. It is unbreakable in principle, but its real implementations have vulnerabilities arising from equipment imperfections. Certification standards [1] and accredited labs are being
established that can test commercial products for these flaws. I explain how we have analysed a commercial quantum key distribution system for loopholes, patched them, and designed tests for the certification lab [2].
[1] ISO/IEC 23837-2:2023(en) international standard.
[2] V. Makarov et al., Phys. Rev. Appl. 22, 044076 (2024), https://arxiv.org/abs/2310.20107
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