期刊
SCIENCE ADVANCES
卷 7, 期 16, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abf9718
关键词
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资金
- National Key R&D Program of China [2017YFB1002900]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program [724306]
- NSFC-DFG joint program (DFG) [ZE953/11-1]
- NSFC-DFG joint program (NSFC) [61861136010]
- Beijing Outstanding Young Scientist Program [BJJWZYJH01201910007022]
- National Natural Science Foundation of China [61775019]
- Fok Ying-Tong Education Foundation of China [161009]
This study demonstrates a novel secret sharing scheme based on metasurface holography, utilizing holographic images for splitting and reconstructing encrypted information, achieving high fidelity secret extraction.
Secret sharing is a well-established cryptographic primitive for storing highly sensitive information like encryption keys for encoded data. It describes the problem of splitting a secret into different shares, without revealing any information to its shareholders. Here, we demonstrate an all-optical solution for secret sharing based on metasurface holography. In our concept, metasurface holograms are used as spatially separable shares that carry encrypted messages in the form of holographic images. Two of these shares can be recombined by bringing them close together. Light passing through this stack of metasurfaces accumulates the phase shift of both holograms and optically reconstructs the secret with high fidelity. In addition, the hologram generated by each single metasurface can uniquely identify its shareholder. Furthermore, we demonstrate that the inherent translational alignment sensitivity between two stacked metasurface holograms can be used for spatial multiplexing, which can be further extended to realize optical rulers.
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