1] Institute for Quantum Computing and Department of Physics & Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1 [2] Centre for Quantum Photonics, H. H. Wills Physics Laboratory & Department of Electrical and Electronic Engineering, University of Bristol, Merchant Venturers Building, Woodland Road, Bristol BS8 1UB, UK.
Center for Quantum Technologies, National University of Singapore, 2 Science Drive 3, Singapore 117543.
Nat Commun. 2014 Mar 12;5:3418. doi: 10.1038/ncomms4418.
Cryptography's importance in our everyday lives continues to grow in our increasingly digital world. Oblivious transfer has long been a fundamental and important cryptographic primitive, as it is known that general two-party cryptographic tasks can be built from this basic building block. Here we show the experimental implementation of a 1-2 random oblivious transfer protocol by performing measurements on polarization-entangled photon pairs in a modified entangled quantum key distribution system, followed by all of the necessary classical postprocessing including one-way error correction. We successfully exchange a 1,366 bit random oblivious transfer string in ~3 min and include a full security analysis under the noisy storage model, accounting for all experimental error rates and finite size effects. This demonstrates the feasibility of using today's quantum technologies to implement secure two-party protocols.
在我们日益数字化的世界中，密码学在我们的日常生活中的重要性不断增加。遗忘传输长期以来一直是一种基本且重要的密码学原语，因为众所周知，一般的两方密码任务可以由这个基本构建块构建。在这里，我们通过在修改后的纠缠量子密钥分发系统中对偏振纠缠光子对进行测量，展示了 1-2 随机遗忘传输协议的实验实现，随后进行了所有必要的经典后处理，包括单向纠错。我们成功地在~3 分钟内交换了 1366 位随机遗忘传输字符串，并在噪声存储模型下进行了全面的安全分析，考虑了所有实验误差率和有限尺寸效应。这证明了使用当今的量子技术来实现安全的两方协议是可行的。
