Experimental quantum homomorphic encryption

Abstract Quantum computers promise not only to outperform classical machines for certain important tasks, but also to preserve privacy of computation. For example, the blind quantum computing protocol enables secure delegated quantum computation, where a client can protect the privacy of their data...

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Autores principales:	Jonas Zeuner, Ioannis Pitsios, Si-Hui Tan, Aditya N. Sharma, Joseph F. Fitzsimons, Roberto Osellame, Philip Walther
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
Acceso en línea:	https://doaj.org/article/76e214f3bab74d25809e88233c1db4ae
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spelling	oai:doaj.org-article:76e214f3bab74d25809e88233c1db4ae2021-12-02T14:06:33ZExperimental quantum homomorphic encryption10.1038/s41534-020-00340-82056-6387https://doaj.org/article/76e214f3bab74d25809e88233c1db4ae2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41534-020-00340-8https://doaj.org/toc/2056-6387Abstract Quantum computers promise not only to outperform classical machines for certain important tasks, but also to preserve privacy of computation. For example, the blind quantum computing protocol enables secure delegated quantum computation, where a client can protect the privacy of their data and algorithms from a quantum server assigned to run the computation. However, this security comes with the practical limitation that the client and server must communicate after each step of computation. A practical alternative is homomorphic encryption, which does not require any interactions, while providing quantum-enhanced data security for a variety of computations. In this scenario, the server specifies the computation to be performed, and the client provides only the input data, thus enabling secure noninteractive computation. Here, we demonstrate homomorphic-encrypted quantum computing with unitary transformations of individual qubits, as well as multi-qubit quantum walk computations using single-photon states and non-birefringent integrated optics. The client encrypts their input in the photons’ polarization state, while the server performs the computation using the path degree of freedom. Our demonstration using integrated quantum photonics underlines the applicability of homomorphic-encrypted quantum computations, and shows the potential for delegated quantum computing using photons.Jonas ZeunerIoannis PitsiosSi-Hui TanAditya N. SharmaJoseph F. FitzsimonsRoberto OsellamePhilip WaltherNature PortfolioarticlePhysicsQC1-999Electronic computers. Computer scienceQA75.5-76.95ENnpj Quantum Information, Vol 7, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95
spellingShingle	Physics QC1-999 Electronic computers. Computer science QA75.5-76.95 Jonas Zeuner Ioannis Pitsios Si-Hui Tan Aditya N. Sharma Joseph F. Fitzsimons Roberto Osellame Philip Walther Experimental quantum homomorphic encryption
description	Abstract Quantum computers promise not only to outperform classical machines for certain important tasks, but also to preserve privacy of computation. For example, the blind quantum computing protocol enables secure delegated quantum computation, where a client can protect the privacy of their data and algorithms from a quantum server assigned to run the computation. However, this security comes with the practical limitation that the client and server must communicate after each step of computation. A practical alternative is homomorphic encryption, which does not require any interactions, while providing quantum-enhanced data security for a variety of computations. In this scenario, the server specifies the computation to be performed, and the client provides only the input data, thus enabling secure noninteractive computation. Here, we demonstrate homomorphic-encrypted quantum computing with unitary transformations of individual qubits, as well as multi-qubit quantum walk computations using single-photon states and non-birefringent integrated optics. The client encrypts their input in the photons’ polarization state, while the server performs the computation using the path degree of freedom. Our demonstration using integrated quantum photonics underlines the applicability of homomorphic-encrypted quantum computations, and shows the potential for delegated quantum computing using photons.
format	article
author	Jonas Zeuner Ioannis Pitsios Si-Hui Tan Aditya N. Sharma Joseph F. Fitzsimons Roberto Osellame Philip Walther
author_facet	Jonas Zeuner Ioannis Pitsios Si-Hui Tan Aditya N. Sharma Joseph F. Fitzsimons Roberto Osellame Philip Walther
author_sort	Jonas Zeuner
title	Experimental quantum homomorphic encryption
title_short	Experimental quantum homomorphic encryption
title_full	Experimental quantum homomorphic encryption
title_fullStr	Experimental quantum homomorphic encryption
title_full_unstemmed	Experimental quantum homomorphic encryption
title_sort	experimental quantum homomorphic encryption
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/76e214f3bab74d25809e88233c1db4ae
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Experimental quantum homomorphic encryption

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