Secure and efficient synchronization scheme for quantum key distribution

• URL: http://arxiv.org/abs/2002.10662v1
• Date: Tue, 25 Feb 2020 04:41:56 GMT
• Title: Secure and efficient synchronization scheme for quantum key distribution
• Authors: Peng Liu and Hua-Lei Yin
• Abstract summary: We propose an alternative synchronization scheme by fixing the relative delay of the signal time window among all SPDs. The new scheme is not only immune to the vulnerability but also improves the synchronization time from usually a few seconds to tens of milliseconds.
• Score: 2.8114538315299558
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: To establish a time reference frame between two users in quantum key distribution, a synchronization calibration process is usually applied for the case of using gated mode single-photon detectors (SPDs). Traditionally, the synchronization calibration is independently implemented by the line length measurement for each SPD. However, this will leave a loophole which has been experimentally demonstrated by a special attack. Here, we propose an alternative synchronization scheme by fixing the relative delay of the signal time window among all SPDs and jointly performing the line length measurement with multiple SPDs under combining low-precision with high-precision synchronization. The new scheme is not only immune to the vulnerability but also improves the synchronization time from usually a few seconds to tens of milliseconds.

Related papers

• Analysis of Asynchronous Protocols for Entanglement Distribution in Quantum Networks [9.971549076128268]
  We explore two minimal asynchronous protocols for entanglement in quantum networks. A parallel scheme generating entanglement independently at the link level, and a sequential scheme extending entanglement iteratively from one party to the other. Our findings suggest the sequential scheme's superiority due to comparable performance with the parallel scheme, coupled with simpler implementation.
  arXiv  Detail & Related papers  (2024-05-03T18:04:11Z)
• Qubit-based distributed frame synchronization for quantum key distribution [9.43392013925968]
  We propose a qubit-based distributed frame synchronization method that can achieve time recovery in a continuously running system. Experimental results show that the proposed method outperforms the advanced qubit-based synchronization method Qubit4Sync. We believe our method is applicable to a broad range of QKD scenarios, including drone-based QKD and quantum network construction.
  arXiv  Detail & Related papers  (2023-08-25T03:17:43Z)
• Two-mode squeezing over deployed fiber coexisting with conventional communications [55.41644538483948]
  Multi-mode squeezing is critical for enabling CV quantum networks and distributed quantum sensing. To date, multi-mode squeezing measured by homodyne detection has been limited to single-room experiments. This demonstration enables future applications in quantum networks and quantum sensing that rely on distributed multi-mode squeezing.
  arXiv  Detail & Related papers  (2023-04-20T02:29:33Z)
• Predicting the State of Synchronization of Financial Time Series using Cross Recurrence Plots [75.20174445166997]
  This study introduces a new method for predicting the future state of synchronization of the dynamics of two financial time series. We adopt a deep learning framework for methodologically addressing the prediction of the synchronization state. We find that the task of predicting the state of synchronization of two time series is in general rather difficult, but for certain pairs of stocks attainable with very satisfactory performance.
  arXiv  Detail & Related papers  (2022-10-26T10:22:28Z)
• Time synchronization protocol for the KLJN secure key exchange scheme [0.0]
  The information theoretically secure Kirchhoff-law-Johnson-noise (KLJN) key exchange scheme is also potentially vulnerable against clock attacks. We propose and explore various ways of clock synchronization for the KLJN system and propose an ultimate protocol that preserves time and hardware integrity under arbitrary attacks.
  arXiv  Detail & Related papers  (2022-07-04T00:33:07Z)
• Secure two-way fiber-optic time transfer against sub-ns asymmetric delay attack [20.00845773010957]
  asymmetric delay attack is a serious threat which cannot be prevent by any encryption method. Two-way fiber-optic time transfer system with time stability with 24.5ps, 3.98ps, and 2.95ps at 1s, 10s, and 100s averaging time is shown experimentally.
  arXiv  Detail & Related papers  (2022-03-08T01:55:59Z)
• Composably secure data processing for Gaussian-modulated continuous variable quantum key distribution [58.720142291102135]
  Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties. We consider a protocol with homodyne detection in the general setting of composable finite-size security. In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
  arXiv  Detail & Related papers  (2021-03-30T18:02:55Z)
• Stability and Identification of Random Asynchronous Linear Time-Invariant Systems [81.02274958043883]
  We show the additional benefits of randomization and asynchrony on the stability of linear dynamical systems. For unknown randomized LTI systems, we propose a systematic identification method to recover the underlying dynamics.
  arXiv  Detail & Related papers  (2020-12-08T02:00:04Z)
• EdgeBERT: Sentence-Level Energy Optimizations for Latency-Aware Multi-Task NLP Inference [82.1584439276834]
  Transformer-based language models such as BERT provide significant accuracy improvement for a multitude of natural language processing (NLP) tasks. We present EdgeBERT, an in-depth algorithm- hardware co-design for latency-aware energy optimization for multi-task NLP.
  arXiv  Detail & Related papers  (2020-11-28T19:21:47Z)
• Absolute clock synchronization with a single time-correlated photon pair source over 10km [0.0]
  We show a point-to-point clock synchronization protocol based on bidirectionally propagating photons generated in a single spontaneous parametric down-conversion source. Tight timing correlations between photon pairs are used to determine the single and round-trip times measured by two separate clocks.
  arXiv  Detail & Related papers  (2020-09-09T08:52:49Z)
• Thermal coupling and effect of subharmonic synchronization in a system of two VO2 based oscillators [55.41644538483948]
  We explore a prototype of an oscillatory neural network (ONN) based on vanadium dioxide switching devices. The effective action radius RTC of coupling depends both on the total energy released during switching and on the average power. In the case of a strong thermal coupling, the limit of the supply current parameters, for which the oscillations exist, expands by 10 %. The effect of subharmonic synchronization hold promise for application in classification and pattern recognition.
  arXiv  Detail & Related papers  (2020-01-06T03:26:53Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.