Hidden multi-dimensional modulation side channels in quantum protocols

• URL: http://arxiv.org/abs/2404.14216v2
• Date: Mon, 17 Feb 2025 02:59:07 GMT
• Title: Hidden multi-dimensional modulation side channels in quantum protocols
• Authors: Amita Gnanapandithan, Li Qian, Hoi-Kwong Lo,
• Abstract summary: We show that, rather surprisingly, hidden multi-dimensional modulation is often performed by practical devices.<n>This violates the dimensional assumption in quantum protocols, thus creating side channels and security loopholes.
• Score: 0.1749935196721634
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum protocols including quantum key distribution and blind quantum computing often require the preparation of quantum states of known dimensions. Here, we show that, rather surprisingly, hidden multi-dimensional modulation is often performed by practical devices. This violates the dimensional assumption in quantum protocols, thus creating side channels and security loopholes. Our work has important impacts on the security of quantum cryptographic protocols.

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