Efficient Implementation of Supersingular Isogeny-Based Diffie-Hellman Key Exchange on ARM

This work investigates the efficiency of implementing the isogeny-based post-quantum key exchange protocol on ARM-powered embedded platforms. The proposed implementation is constatnt-time and resistant against the best known quantum attacks. We analyze the recent projective isogeny formulas presented by Microsoft research. Results are the fastest implementation of SIDH protocol on ARM-powered devices found in the literature.