- By:
- Smith Iv, Amos M; Evans, Philip G; Williams, Brian P; Grice, Warren P
- Journal Name:
- Proceedings of SPIE
- Page Number:
- 1
- Volume:
- 9500
- Issue Number:
- N/A
- Publication Date:
- July 29, 2015
- Conference Name:
- SPIE Defense, Security and Sensing techonologies
- Conference Location:
- Baltimore, Maryland, United States of America
- View DOI Listing:
- https://doi.org/10.1117/12.2178917
Abstract
We demonstrate a quantum time distribution (QTD) method that combines the precision of optical timing techniques with the integrity of quantum key distribution (QKD). Critical infrastructure is dependent on microprocessor- and programmable logic-based monitoring and control systems. The distribution of timing information across the electric grid is accomplished by GPS signals which are known to be vulnerable to spoofing. We demonstrate a method for synchronizing remote clocks based on the arrival time of photons in a modifed QKD system. This has the advantage that the signal can be veried by examining the quantum states of the photons similar to QKD.
