تقرير
Modulation leakage vulnerability in continuous-variable quantum key distribution
| العنوان: | Modulation leakage vulnerability in continuous-variable quantum key distribution |
|---|---|
| المؤلفون: | Jain, Nitin, Derkach, Ivan, Chin, Hou-Man, Filip, Radim, Andersen, Ulrik L., Usenko, Vladyslav C., Gehring, Tobias |
| المصدر: | Quantum Sci. Technol. 6, 045001 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | Flaws in the process of modulation, or encoding of key bits in the quadratures of the electromagnetic light field, can make continuous-variable quantum key distribution systems susceptible to leakage of secret information. Here, we report such a modulation leakage vulnerability in a system that uses an optical in-phase and quadrature modulator to implement a single sideband encoding scheme. The leakage arises from the limited suppression of a quantum-information-carrying sideband during modulation. Based on the results from a proof-of-concept experiment, we theoretically analyse the impact of this vulnerability. Our results indicate that the leakage reduces the range over which a positive secret key can be obtained, and can even lead to a security breach if not properly taken into account. We also study the effectiveness of additional trusted noise as a countermeasure to this vulnerability. Comment: 12 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/2058-9565/ac0d4c |
| URL الوصول: | http://arxiv.org/abs/2103.14567 |
| رقم الأكسشن: | edsarx.2103.14567 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/2058-9565/ac0d4c |
|---|