Cryptology ePrint Archive: Report 2019/751

Discrete logarithms in quasi-polynomial time in finite fields of fixed characteristic

Thorsten Kleinjung and Benjamin Wesolowski

Abstract: We prove that the discrete logarithm problem can be solved in quasi-polynomial expected time in the multiplicative group of finite fields of fixed characteristic. More generally, we prove that it can be solved in the field of cardinality $p^n$ in expected time $(pn)^{2\log_2(n) + O(1)}$.

Category / Keywords: public-key cryptography / discrete logarithm problem, finite field

Date: received 25 Jun 2019, last revised 21 Nov 2019

Contact author: bj wesolowski at orange fr

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Version: 20191121:174618 (All versions of this report)

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