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IEICE TRANSACTIONS on Fundamentals

Faster Key Generation of Supersingular Isogeny Diffie-Hellman

Kaizhan LIN, Fangguo ZHANG, Chang-An ZHAO

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Summary :

Supersingular isogeny Diffie-Hellman (SIDH) is attractive for its relatively small public key size, but it is still unsatisfactory due to its efficiency, compared to other post-quantum proposals. In this paper, we focus on the performance of SIDH when the starting curve is E6 : y2 = x3 + 6x2 + x, which is fixed in Round-3 SIKE implementation. Inspired by previous works [1], [2], we present several tricks to accelerate key generation of SIDH and each process of SIKE. Our experimental results show that the performance of this work is at least 6.09% faster than that of the SIKE implementation, and we can further improve the performance when large storage is available.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E105-A No.12 pp.1551-1558
Publication Date
2022/12/01
Publicized
2022/05/30
Online ISSN
1745-1337
DOI
10.1587/transfun.2022EAP1026
Type of Manuscript
PAPER
Category
Cryptography and Information Security

Authors

Kaizhan LIN
  Sun Yat-Sen University
Fangguo ZHANG
  Sun Yat-sen University,Guangdong Key Laboratory of Information Security
Chang-An ZHAO
  Sun Yat-Sen University,Guangdong Key Laboratory of Information Security

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