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Compact and Simple RLWE Based Key Encapsulation Mechanism
Date
2019-01-01
Author
Alkim, Erdem
Bilgin, Yusuf Alper
Cenk, Murat
Metadata
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n this paper, we propose a key encapsulation scheme based on NewHope and Kyber, two NIST post-quantum standardization project candidates. Our scheme is based on NewHope, thus it is simple and has fast implementation while it is making use of smaller key sizes and easily changeable security level advantages of Kyber. The scheme heavily use recent advances on Number Theoretic Transform (NTT) in a way that transformation from one degree polynomial to another is easy. To make it possible, we changed the definition of component in component-wise multiplication during polynomial multiplication and show that changing security level only requires to change the size of polynomial and the definition of component. Our scheme has 11.5% smaller communication cost for the same security level comparing with NewHope. In addition, it is at least 17% faster C implementation comparing with non-optimized Kyber implementation from the first round of the NIST standardization process.
Subject Keywords
NTT
,
RLWE
,
Lattice-based cryptography
,
Post-quantum key encapsulation
URI
https://hdl.handle.net/11511/30010
DOI
https://doi.org/10.1007/978-3-030-30530-7_12
Conference Name
6th International Conference on Cryptology and Information Security in Latin America (LATINCRYPT)
Collections
Graduate School of Applied Mathematics, Conference / Seminar
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E. Alkim, Y. A. Bilgin, and M. Cenk, “Compact and Simple RLWE Based Key Encapsulation Mechanism,” Santiago de Chile, CHILE, 2019, vol. 11774, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30010.