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Experimental Quantum Homomorphic Encryption Using a Quantum Photonic Chip.

Yuan Li1, Lin Cao2, Wei Luo1

  • 1Institute of Quantum Technology (IQT), The Hong Kong Polytechnic University, Hong Kong, 11 Yuk Choi Rd, Hung Hom, Hong Kong.

Physical Review Letters
|June 3, 2024
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Summary
This summary is machine-generated.

We demonstrated a scalable quantum homomorphic encryption system using photonic chips. This breakthrough enables secure quantum computations on encrypted data, overcoming limitations of traditional systems.

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Area of Science:

  • Quantum Information Science
  • Cryptography
  • Photonic Integrated Circuits

Background:

  • Fully homomorphic encryption (FHE) allows computation on encrypted data, crucial for secure cloud computing.
  • Existing FHE systems face scalability and stability challenges, hindering practical applications.
  • Secure quantum channels are needed for distributed quantum computing and secure access to quantum resources.

Purpose of the Study:

  • To experimentally demonstrate a proof-of-concept for quantum homomorphic encryption (QHE) on a compact quantum chip.
  • To address the scalability limitations of traditional homomorphic encryption systems.
  • To verify the feasibility of using photonic chips for implementing QHE.

Main Methods:

  • Implementation of a homomorphic encryption scheme on a compact photonic quantum chip.
  • Experimental verification of the scheme's functionality for secure quantum computations.
  • Focus on circuit expansion and miniaturization of quantum network infrastructure.

Main Results:

  • Successful experimental demonstration of a homomorphic encryption scheme on a quantum chip.
  • Verification of the feasibility of photonic chips for quantum homomorphic encryption.
  • Significant reduction in the size of quantum network infrastructure.

Conclusions:

  • Photonic quantum chips offer a viable platform for scalable quantum homomorphic encryption.
  • This work overcomes key scalability challenges in quantum homomorphic encryption.
  • The findings pave the way for advanced, highly sophisticated quantum FHE systems.