Paper 2014/641
The Multiple Number Field Sieve with Conjugation Method
Cécile Pierrot
Abstract
In this short paper, we propose a variant of the Number Field Sieve to compute discrete logarithms in medium characteristic finite fields. We propose an algorithm that combines two recent ideas, namely the Multiple variant of the Number Field Sieve taking advantage of a large number of number fields in the sieving phase and the Conjugation Method giving a new polynomial selection for the classical Number Field Sieve. The asymptotic complexity of our improved algorithm is L_Q (1/3, (8 (9+4 \sqrt{6})/15)^1/3), where F_Q is the target finite field and (8 (9+4 \sqrt{6})/15)^1/3) is approximately equal to 2.156. This has to be compared with the complexity of the previous state-of-the-art algorithm for medium characteristic finite fields, the Number Field Sieve with Conjugation Method, that has a complexity of approximately L_Q(1/3, 2.201).
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Preprint. MINOR revision.
- Keywords
- Discrete LogarithmFinite FieldMedium CharacteristicNFS
- Contact author(s)
- Cecile Pierrot @ lip6 fr
- History
- 2015-09-11: revised
- 2014-08-27: received
- See all versions
- Short URL
- https://ia.cr/2014/641
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2014/641,
author = {Cécile Pierrot},
title = {The Multiple Number Field Sieve with Conjugation Method},
howpublished = {Cryptology {ePrint} Archive, Paper 2014/641},
year = {2014},
url = {https://eprint.iacr.org/2014/641}
}
