Experimental quantum data locking
Abstract
Classical correlation can be locked via quantum means--quantum data locking. With a short secret key, one can lock an exponentially large amount of information, in order to make it inaccessible to unauthorized users without the key. Quantum data locking presents a resource-efficient alternative to one-time pad encryption which requires a key no shorter than the message. We report experimental demonstrations of quantum data locking scheme originally proposed by DiVincenzo et al. [Phys. Rev. Lett. 92, 067902 (2004)] and a loss-tolerant scheme developed by Fawzi, Hayde, and Sen [J. ACM. 60, 44 (2013)]. We observe that the unlocked amount of information is larger than the key size in both experiments, exhibiting strong violation of the incremental proportionality property of classical information theory. As an application example, we show the successful transmission of a photo over a lossy channel with quantum data (un)locking and error correction.
Cite
@article{arxiv.1605.04030,
title = {Experimental quantum data locking},
author = {Yang Liu and Zhu Cao and Cheng Wu and Daiji Fukuda and Lixing You and Jiaqiang Zhong and Takayuki Numata and Sijing Chen and Weijun Zhang and Sheng-Cai Shi and Chao-Yang Lu and Zhen Wang and Xiongfeng Ma and Jingyun Fan and Qiang Zhang and Jian-Wei Pan},
journal= {arXiv preprint arXiv:1605.04030},
year = {2016}
}