Experimental quantum secure network with digital signatures and encryption release_zy4aq3ssfzdhjlxwz2jels34ym

by Hua-Lei Yin, Yao Fu, Chen-Long Li, Chen-Xun Weng, Bing-Hong Li, Jie Gu, Yu-Shuo Lu, Shan Huang, Zeng-Bing Chen

Released as a article .

2022  

Abstract

Cryptography promises four information security objectives, namely, confidentiality, integrity, authenticity and nonrepudiation, to support trillions of transactions every year in the digital economy. Efficient digital signatures, ensuring the integrity, authenticity and nonrepudiation of data with provable security, are highly urgent and intractable open problems. Here, we propose a protocol of high-efficiency quantum digital signature using secret sharing, one-time universal_2 hashing and the one-time pad. We just need to use a 384-bit key to sign documents of up to 2^64 lengths with a security bound of 10^-19. If one megabit document is signed, the signature efficiency is improved by more than 10^8 times compared with previous quantum digital signature protocols. Furthermore, we build the first all-in-one quantum secure network integrating provably secure communication, digital signatures, secret sharing and conference key agreement and experimentally demonstrate this signature efficiency advantage. Our work completes the cryptography toolbox of the four information security objectives.
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Date   2022-02-11
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arXiv  2107.14089v3
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