Cryptology ePrint Archive: Report 2019/815

A Note on the Static-Static Key Agreement Protocol from Supersingular Isogenies

Selçuk Kayacan

Abstract: The basic Supersingular Isogeny Diffie-Hellman (SIDH) key agreement protocol is insecure due to an attack described by Galbraith, Petit, Shani and Ti. In this note we present two variants of SIDH that are immune to this attack.

Category / Keywords: cryptographic protocols / key agreement, post-quantum cryptography, supersingular isogeny Diffie-Hellman

Date: received 14 Jul 2019, withdrawn 16 Nov 2019

Contact author: kayacan selcuk at gmail com

Available format(s): (-- withdrawn --)

Version: 20191116:075420 (All versions of this report)

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