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Improved Polynomial Multiplication Algorithms over Characteristic Three Fields and Applications to NTRU Prime
Date
2022-01-01
Author
Yeniaras, Esra
Cenk, Murat
Metadata
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This paper introduces a new polynomial multiplication algorithm which decreases the arithmetic complexity and another modified algorithm that speeds up the implementation run-time over the characteristic three fields. We first introduce a new polynomial multiplication algorithm using a 4-way split approach and observe that its asymptotic arithmetic complexity is better than Bernstein’s 3-way method for characteristic three fields. We then define an unbalanced split version a 5-way split method which is faster than Bernstein’s 3-way method in terms of implementation speed. We observe that, compared to the most recent methods, for the input size 1280, the new 4-way method together with the unbalanced 5-way split one provide a 48.6 % decrease in arithmetic complexity for polynomial multiplication over F9 and a 26.8 % decrease for polynomial multiplication over F3 respectively. Moreover, from the implementation perspective, the unbalanced 5-way algorithm yields faster polynomial multiplication results. For application purposes, we pick the quantum-resistant key encapsulation protocol NTRU Prime, proposed by Bernstein et al., since it executes a characteristic three polynomial multiplication in the decapsulation stage. Implementing the proposed algorithms combining with the other known methods in C, on an Intel (R) Core (TM) i7-10510U architecture, we observe a 29.85 % speedup for sntrup653 and a 35.52 % speedup for sntrup761.
Subject Keywords
Characteristic three fields
,
Efficient polynomial multiplication
,
Interpolation
,
Karatsuba
,
Key encapsulation
,
Lattice-based cryptography
,
NTRU prime
,
Post-quantum cryptography
URI
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141825992&origin=inward
https://hdl.handle.net/11511/101507
DOI
https://doi.org/10.1007/978-3-031-17510-7_9
Conference Name
14th International Conference on Innovative Security Solutions for Information Technology and Communications, SecITC 2021
Collections
Graduate School of Applied Mathematics, Conference / Seminar
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NEW EFFICIENT CHARACTERISTIC THREE POLYNOMIAL MULTIPLICATION ALGORITHMS AND THEIR APPLICATIONS TO NTRU PRIME
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E. Yeniaras and M. Cenk, “Improved Polynomial Multiplication Algorithms over Characteristic Three Fields and Applications to NTRU Prime,” Virtual, Online, 2022, vol. 13195 LNCS, Accessed: 00, 2023. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85141825992&origin=inward.