Abstract:In order to improve the computing efficiency of k1P+k2Q in elliptic curve cryptosystem, a new seven- element Joint Sparse Form (JSF) is proposed in this paper. For any pair of integers, the definition and calculating algorithm of the new seven-element JSF are given, and the uniqueness of the new seven-element JSF is proven. Besides, it is also proven that the average joint Hamming density of the new seven-element JSF is 0.3023. When computing k1P+k2Q, the new seven-element JSF reduces 0.1977l point additions comparing with the optimal three-element JSF, and reduces 0.031l point additions comparing with an existing five-element JSF, and reduces 0.0392l point additions comparing with another existing seven-element JSF.
杨先文, 李峥. 一种新的七元联合稀疏型表示及其应用[J]. 电子与信息学报, 2012, 34(2): 446-450.
Yang Xian-Wen, Li Zheng. New Seven-element Joint Sparse Form for Pairs of Integers and Its Applications. , 2012, 34(2): 446-450.