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A New Quantum Secure Time Transfer System

Ravi Singh Adhikari, Aman Gupta, Anju Rani, Xiaoyu Ai, Robert Malaney
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⚡ Quantum Brief
Researchers led by Ravi Singh Adhikari demonstrated a breakthrough quantum secure time transfer (QSTT) system, experimentally validated in November 2025, that counters intercept-resend, spoofing, and delay attacks plaguing traditional clock synchronization. The system leverages self-generated quantum keys to information-theoretically secure the maximum timing data, eliminating vulnerabilities in quantum communication, sensing, and positioning networks where precision synchronization is critical. A hybrid quantum/post-quantum architecture integrates an obfuscated encryption sequence, providing an additional layer of security for residual timing data not covered by quantum keys. This dual approach—combining quantum key distribution with post-quantum obfuscation—marks the first implementation to achieve information-theoretic security for both primary and secondary timing signals. The team claims this design is the most robust QSTT solution to date, addressing long-standing security gaps in distributed quantum networks while maintaining high-precision synchronization.
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Quantum Physics arXiv:2511.10847 (quant-ph) [Submitted on 13 Nov 2025] Title:A New Quantum Secure Time Transfer System Authors:Ravi Singh Adhikari, Aman Gupta, Anju Rani, Xiaoyu Ai, Robert Malaney View a PDF of the paper titled A New Quantum Secure Time Transfer System, by Ravi Singh Adhikari and 4 other authors View PDF HTML (experimental) 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. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2511.10847 [quant-ph] (or arXiv:2511.10847v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2511.10847 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Ravi Singh Adhikari Mr [view email] [v1] Thu, 13 Nov 2025 23:15:04 UTC (863 KB) Full-text links: Access Paper: View a PDF of the paper titled A New Quantum Secure Time Transfer System, by Ravi Singh Adhikari and 4 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2025-11 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) Links to Code Toggle Papers with Code (What is Papers with Code?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)

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