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Single trace side-channel attack on key reconciliation in quantum key distribution system and its efficient countermeasures

Authors
Park, D.Kim, G.Heo, D.Kim, S.Kim, H.Hong, S.
Issue Date
Mar-2021
Publisher
Korean Institute of Communication Sciences
Keywords
Low-density parity-check code; Quantum key distribution; Security; Side-channel attack; Single trace attack
Citation
ICT Express, v.7, no.1, pp 36 - 40
Pages
5
Indexed
SCIE
SCOPUS
KCI
Journal Title
ICT Express
Volume
7
Number
1
Start Page
36
End Page
40
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/129119
DOI
10.1016/j.icte.2021.01.013
ISSN
2405-9595
2405-9595
Abstract
Although quantum mechanics guarantees the security of the quantum key distribution system, it is crucial to examine whether the implementation flaws can lead to the disclosure of sensitive information. In this paper, we propose the side-channel attack on the key reconciliation in the quantum key distribution system. In this system, the sifted key and the syndrome are used to derive a shared secret key between two users. From our attack, these can be fully recovered through a single power consumption trace measured during the syndrome computation on the sender's side. Additionally, we propose efficient countermeasures to thwart such side-channel attacks. © 2021 The Korean Institute of Communications and Information Sciences (KICS)
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