安全芯片有资源受限的问题,这致使椭圆曲线密码算法抵抗功耗攻击的方案在效率和安全两方面产生了矛盾.首先利用带符号的整数拆分形式对标量进行编码,并采用预计算和标量分割技术把标量乘运算变换成一组椭圆曲线上的点的点加运算,进而利用基点掩码实现椭圆曲线密码的抗功耗攻击.算法安全性及性能分析结果表明,基于整数拆分的抗功耗攻击方案的运算效率与传统的抗功耗攻击方法相比明显提高,可以很好地满足安全芯片等资源受限的应用系统.%The contradiction between efficiency and security lies in the scheme of resisting power analysis attack for ellipse curve cryptography due to the limited resource of security chip.Firstly,combining with the method of the pre computation table and scalar division,scalar multiplication was turned into a set of point addition of ellipse curve by coding the scalar with signed integer splitting form.And then a scheme based on signed integer splitting form was presented by basic point masking algorithm.Security and performance analysis shows that the improved scheme has higher efficiency comparing with other resisting power analysis attacks,and can be used in the limited resource system preferably.
展开▼
