Wang Chao, Kon Wen Yu, Ng Hong Jie, Lim Charles C-W
Department of Electrical & Computer Engineering, National University of Singapore, Singapore, Singapore.
Centre for Quantum Technologies, National University of Singapore, Singapore, Singapore.
Light Sci Appl. 2022 Sep 13;11(1):268. doi: 10.1038/s41377-022-00959-6.
Secure information retrieval is an essential task in today's highly digitised society. In some applications, it may be necessary that user query's privacy and database content's security are enforced. For these settings, symmetric private information retrieval (SPIR) could be employed, but its implementation is known to be demanding, requiring a private key-exchange network as the base layer. Here, we report for the first time a realisation of provably-secure SPIR supported by a quantum-secure key-exchange network. The SPIR scheme looks at biometric security, offering secure retrieval of 582-byte fingerprint files from a database with 800 entries. Our experimental results clearly demonstrate the feasibility of SPIR with quantum secure communications, thereby opening up new possibilities in secure distributed data storage and cloud computing over the future Quantum Internet.
在当今高度数字化的社会中，安全信息检索是一项至关重要的任务。在某些应用中，可能有必要确保用户查询的隐私和数据库内容的安全。对于这些场景，可以采用对称私有信息检索（SPIR），但其实现要求很高，需要一个私钥交换网络作为基础层。在此，我们首次报告了一种由量子安全密钥交换网络支持的可证明安全的SPIR的实现。该SPIR方案着眼于生物特征安全，可从一个包含800条条目的数据库中安全检索582字节的指纹文件。我们的实验结果清楚地证明了量子安全通信实现SPIR的可行性，从而为未来量子互联网上的安全分布式数据存储和云计算开辟了新的可能性。
