{"guid":"2404209f-89b5-52a3-a94a-d4a4fcc11552","title":"Quantum cryptography and its certification against attacks","subtitle":null,"slug":"why2025-217-quantum-cryptography-and-its-certification-against-attacks","link":"https://program.why2025.org/why2025/talk/DFCBQD/","description":"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\nestablished 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].\n\n[1] ISO/IEC 23837-2:2023(en) international standard.\n[2] V. Makarov et al., Phys. Rev. Appl. 22, 044076 (2024), https://arxiv.org/abs/2310.20107\n\nLicensed to the public under https://creativecommons.org/licenses/by/4.0/","original_language":"eng","persons":["Vadim Makarov"],"tags":["217","2025","why2025","Hacking","Brachium","why2025-eng","Day 4"],"view_count":347,"promoted":false,"date":"2025-08-10T12:00:00.000+02:00","release_date":"2025-08-11T00:00:00.000+02:00","updated_at":"2026-04-03T00:30:04.863+02:00","length":3128,"duration":3128,"thumb_url":"https://static.media.ccc.de/media/events/why2025/217-2404209f-89b5-52a3-a94a-d4a4fcc11552.jpg","poster_url":"https://static.media.ccc.de/media/events/why2025/217-2404209f-89b5-52a3-a94a-d4a4fcc11552_preview.jpg","timeline_url":"https://static.media.ccc.de/media/events/why2025/217-2404209f-89b5-52a3-a94a-d4a4fcc11552.timeline.jpg","thumbnails_url":"https://static.media.ccc.de/media/events/why2025/217-2404209f-89b5-52a3-a94a-d4a4fcc11552.thumbnails.vtt","frontend_link":"https://media.ccc.de/v/why2025-217-quantum-cryptography-and-its-certification-against-attacks","url":"https://api.media.ccc.de/public/events/2404209f-89b5-52a3-a94a-d4a4fcc11552","conference_title":"What Hackers Yearn 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