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A New Algorithm for Double Scalar Multiplication over Koblitz Curves (1801.08589v1)
Published 25 Jan 2018 in cs.CR and cs.DS
Abstract: Koblitz curves are a special set of elliptic curves and have improved performance in computing scalar multiplication in elliptic curve cryptography due to the Frobenius endomorphism. Double-base number system approach for Frobenius expansion has improved the performance in single scalar multiplication. In this paper, we present a new algorithm to generate a sparse and joint $\tau$-adic representation for a pair of scalars and its application in double scalar multiplication. The new algorithm is inspired from double-base number system. We achieve 12% improvement in speed against state-of-the-art $\tau$-adic joint sparse form.