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用P-adic数域上椭圆曲线构造密码的可能性

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摘要 提出了基于p进数域上的椭圆曲线的有理点群的商群的密码系统.这种密码与基于有限域上的椭圆曲线密码相比,增加了新的加密参数,在倍乘运算等方面具有优越性,且有相同的安全强度.给出了密码群的生成元的选取方法,通过建立这种商群的元素与其坐标近似值的一一对映应关系,解决了p进数域的椭圆曲线商群元素有限表示问题,并且给出了在此近似表示下商群的运算方法.
出处 《中国科学(E辑)》 CSCD 北大核心 2008年第2期236-251,共16页 Science in China(Series E)
基金 国家自然科学基金(批准号:60763009,10531060) 国家高技术研究发展计划(批准号:2007AA701315)资助项目
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