Towards Isogeny-Based Password-Authenticated Key Establishment

Author:

Taraskin Oleg1,Soukharev Vladimir2,Jao David3,LeGrow Jason T.3

Affiliation:

1. Waves Platform , Moscow , Russian Federation

2. InfoSec Global, Toronto , Ontario , Canada , M2J 5C2

3. University of Waterloo, 200 University Avenue West, Waterloo , Ontario , Canada , N2L 3G1

Abstract

Abstract Password authenticated key establishment (PAKE) is a cryptographic primitive that allows two parties who share a low-entropy secret (a password) to securely establish cryptographic keys in the absence of public key infrastructure. We propose the first quantum-resistant password-authenticated key exchange scheme based on supersingular elliptic curve isogenies. The scheme is built upon supersingular isogeny Diffie-Hellman [15], and uses the password to generate permutations which obscure the auxiliary points. We include elements of a security proof, and discuss roadblocks to obtaining a proof in the BPR model [1]. We also include some performance results.

Publisher

Walter de Gruyter GmbH

Subject

Applied Mathematics,Computational Mathematics,Computer Science Applications

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