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Title:
Fast, uniform scalar multiplication for genus 2 Jacobians with fast Kummers
Authors: Ping Ngai Chung, Craig Costello, Benjamin Smith
Abstract:We give one- and two-dimensional scalar multiplication algorithms for Jacobians of genus~2 curves that operate by projecting to Kummer surfaces, where we can exploit faster and more uniform pseudomultiplication, before recovering the proper “signed” output back on the Jacobian. This extends the work of Lopez and Dahab, Okeya and Sakurai, and Brier and Joye to genus 2, and also to two-dimensional scalar multiplication. The technique is especially interesting in genus 2, because Kummer surfaces can outperform comparable elliptic curve systems.
ePrint: https://eprint.iacr.org/2016/777
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