dorsal/arxiv
View SchemaTime-shift attack in practical quantum cryptosystems
| Authors | Bing Qi, Chi-Hang Fred Fung, Hoi-Kwong Lo, Xiongfeng Ma |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0512080 |
| URL | https://arxiv.org/abs/quant-ph/0512080 |
| Journal | Quantum Information and Computation, vol. 7, pp. 073-082 (2007) |
Abstract
Recently, a new type of attack, which exploits the efficiency mismatch of two single photon detectors (SPD) in a quantum key distribution (QKD) system, has been proposed. In this paper, we propose another "time-shift" attack that exploits the same imperfection. In our attack, Eve shifts the arrival time of either the signal pulse or the synchronization pulse or both between Alice and Bob. In particular, in a QKD system where Bob employs time-multiplexing technique to detect both bit "0" and bit "1" with the same SPD, Eve, in principle, could acquire full information on the final key without introducing any error. Finally, we discuss some counter measures against our and earlier attacks.
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"abstract": "Recently, a new type of attack, which exploits the efficiency mismatch of two\nsingle photon detectors (SPD) in a quantum key distribution (QKD) system, has\nbeen proposed. In this paper, we propose another \"time-shift\" attack that\nexploits the same imperfection. In our attack, Eve shifts the arrival time of\neither the signal pulse or the synchronization pulse or both between Alice and\nBob. In particular, in a QKD system where Bob employs time-multiplexing\ntechnique to detect both bit \"0\" and bit \"1\" with the same SPD, Eve, in\nprinciple, could acquire full information on the final key without introducing\nany error. Finally, we discuss some counter measures against our and earlier\nattacks.",
"arxiv_id": "quant-ph/0512080",
"authors": [
"Bing Qi",
"Chi-Hang Fred Fung",
"Hoi-Kwong Lo",
"Xiongfeng Ma"
],
"categories": [
"quant-ph"
],
"journal_ref": "Quantum Information and Computation, vol. 7, pp. 073-082 (2007)",
"title": "Time-shift attack in practical quantum cryptosystems",
"url": "https://arxiv.org/abs/quant-ph/0512080"
},
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