论文标题
固定双向光纤时间转移，以防止子NS不对称延迟攻击
Secure two-way fiber-optic time transfer against sub-ns asymmetric delay attack
论文作者
论文摘要
双向光纤时间传输是一种具有次纳秒精度的有希望的精确时间同步技术。但是，不对称延迟攻击是一个严重的威胁，无法通过任何加密方法预防。在本文中，提出了一种基于动态模型的方案来防御亚纳秒不对称延迟攻击。根据两态时钟模型，根据估计的时间差设置阈值，其中固定频率差不在时间差中以检测不对称延迟攻击，该延迟攻击小于固定频率差异引起的时间差。实施理论模拟和实验演示以证明该方案的可行性。在1s，10s和100s平均时间的24.5ps，3.98ps和2.95ps的时间稳定性的双向光纤时间传输系统下，在Sub-NS非对称时间延迟延迟攻击下显示在实验中。提出的方法提供了一种有希望的安全子NS精确的时间同步技术，以防止非对称延迟攻击。
Two-way fiber-optic time transfer is a promising precise time synchronization technique with sub-nanosecond accuracy. However, asymmetric delay attack is a serious threat which cannot be prevent by any encryption method. In this paper, a dynamic model based scheme is proposed to defense the sub-nanosecond asymmetric delay attack. A threshold is set according to the estimated time difference by a two-state clock model where the fixed frequency difference is excluded from the time difference to detect the asymmetric delay attack which is smaller than the time difference induced by the fixed frequency difference. Theoretical simulation and experimental demonstration are implemented to prove the feasibility of the scheme. A 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 under sub-ns asymmetric time delay attack experimentally. The proposed method provides a promising secure sub-ns precise time synchronization technique against asymmetric delay attack.
