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.

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Cited by in corpus (10)

• Advances in Quantum Cryptography
• Secure quantum key distribution with realistic devices
• Entangled Photon-Pair Sources based on three-wave mixing in bulk crystals
• A Quantum Enigma Machine: Experimentally Demonstrating Quantum Data Locking
• Structure and Composition of the 200 K-Superconducting Phase of H2S under Ultrahigh Pressure: The Perovskite (SH-)(H3S+)
• Quantum key distribution protocol with pseudorandom bases
• Quantum cryptography beyond key distribution: theory and experiment
• Photonic quantum data locking
• Metric and classical fidelity uncertainty relations for random unitary matrices
• Fault tolerant quantum data locking