By calculating the edit distance between strings consisting of the types of special points, this method can quickly detect random forgeries.This can improve the speed of the system.

• 同时通过计算特殊点类型所组成的字符串的编辑距离，能够很快地发现与真签名差距较大的自由伪造签名，从而提高整个系统的反应速度。