A New Quantum Secure Time Transfer System

• URL: http://arxiv.org/abs/2511.10847v1
• Date: Thu, 13 Nov 2025 23:15:04 GMT
• Title: A New Quantum Secure Time Transfer System
• Authors: Ravi Singh Adhikari, Aman Gupta, Anju Rani, Xiaoyu Ai, Robert Malaney,
• Abstract summary: High-precision clock synchronization is essential for a wide range of network-distributed applications.<n>Current synchronization techniques are vulnerable to attacks, such as intercept-resend attacks, spoofing, and delay attacks.<n>We propose and experimentally demonstrate a new quantum secure time transfer system, subsequently used for clock synchronization.
• Score: 3.9556117884773
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: High-precision clock synchronization is essential for a wide range of network-distributed applications. In the quantum space, these applications include communication, sensing, and positioning. However, current synchronization techniques are vulnerable to attacks, such as intercept-resend attacks, spoofing, and delay attacks. Here, we propose and experimentally demonstrate a new quantum secure time transfer (QSTT) system, subsequently used for clock synchronization, that largely negates such attacks. Novel to our system is the optimal use of self-generated quantum keys within the QSTT to information-theoretically secure the maximum amount of timing data; as well as the introduction, within a hybrid quantum/post-quantum architecture, of an information-theoretic secure obfuscated encryption sequence of the remaining timing data. With these enhancements, we argue that our new system represents the most robust implementation of QSTT to date.

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