NDLI: Improved key integrity checking for high-speed quantum key distribution using combinatorial group testing with strongly selective family design

Content Provider	Springer Nature Link
Author	Fang, Junbin Jiang, Zoe L. Ren, Kexin Luo, Yunhan Chen, Zhe Liu, Weiping Wang, Xuan Niu, Xiamu Yiu, S. M. Hui, Lucas C. K.
Copyright Year	2014
Abstract	Key integrity checking is a necessary process in practical quantum key distribution (QKD) to check whether there is any error bit escaped from the previous error correction procedure. The traditional single-hash method may become a bottleneck in high-speed QKD since it has to discard all the key bits even if just one error bit exists. In this paper, we propose an improved scheme using combinatorial group testing (CGT) based on strong selective family design to verify key integrity in fine granularity and consequently improve the total efficiency of key generation after the error correction procedure. Code shortening technique and parallel computing are also applied to enhance the scheme’s flexibility and to accelerate the computation. Experimental results show that the scheme can identify the rare error bits precisely and thus avoid dropping the great majority of correct bits, while the overhead is reasonable. For a $$2^{20}$$ -bit key, the disclosed information for public comparison is 800 bits (about 0.076 % of the key bits), reducing 256 bits when compared with the previous CGT scheme. Besides, with an Intel$^{®}$ quad-cores CPU at 3.40 GHz and 8 GB RAM, the computational times are 3.0 and 6.3 ms for hashing and decoding, respectively, which are reasonable in real applications and will not cause significant latency in practical QKD systems.
Starting Page	1425
Ending Page	1435
Page Count	11
File Format	PDF
ISSN	15700755
Journal	Quantum Information Processing
Volume Number	13
Issue Number	6
e-ISSN	15731332
Language	English
Publisher	Springer US
Publisher Date	2014-02-13
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	High-speed quantum key distribution Key integrity checking Combinatorial group testing Strong selective family Quantum Information Technology, Spintronics Quantum Computing Data Structures, Cryptology and Information Theory Quantum Physics Mathematical Physics
Content Type	Text
Resource Type	Article
Subject	Statistical and Nonlinear Physics Theoretical Computer Science Signal Processing Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering Modeling and Simulation

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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