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    • 92. 发明申请
    • APPARATUS AND METHOD FOR CALCULATING A RESULT IN A SCALAR MULTIPLICATION
    • 用于计算标量多项式中的结果的装置和方法
    • US20120207298A1
    • 2012-08-16
    • US13025221
    • 2011-02-11
    • Bernd Meyer
    • Bernd Meyer
    • H04L9/28
    • G06F7/725G06F2207/7223H04L9/003H04L9/3066H04L2209/08
    • An apparatus for calculating a result of a scalar multiplication of a reference number with a reference point on an elliptic curve includes a random number generator and processor. The random number generator generates a random bit. The processor calculates the result of the scalar multiplication based on a calculation algorithm using a first auxiliary variable storing a first interim result representing an integer multiple of the reference point or a coordinate of an integer multiple of the reference point and a second auxiliary variable storing a second interim result representing another integer multiple of the reference point or a coordinate of another integer multiple of the reference point. The processor swaps a value stored by the first auxiliary variable and a value stored by the second auxiliary variable during calculation of the result of the scalar multiplication, if a swap condition depending on the generated random bit is fulfilled.
    • 用于计算参考数与椭圆曲线上的参考点的标量乘积的结果的装置包括随机数发生器和处理器。 随机数生成器生成一个随机位。 处理器基于使用存储表示参考点的整数倍的第一中间结果或参考点的整数倍的坐标的第一辅助变量和存储参考点的整数倍的坐标的第一辅助变量来计算标量乘法的结果 表示参考点的另一整数倍的第二临时结果或参考点的另一整数倍的坐标。 如果满足取决于所生成的随机位的交换条件,则处理器在计算标量乘法的结果期间交换由第一辅助变量存储的值和由第二辅助变量存储的值。