基于模糊穹的特征保护方法存在敌手冒充和空间自由度减少的问题。为此,提出一种基于伪矩阵(Chaff Matrix)的可撤销声纹模板设计方法。通过原始特征矢量的构成元素产生伪点,根据定位矩阵将伪点插入原始特征,且在欧氏距离准则下,插入前后特征矢量与模板之间距离的变化量相同,从而保证系统识别率,实现特征保护。实验结果验证了该方法的正确性。 The method of feature preservation based on fuzzy domes has the problem of impersonation and reduction of the degree of freedom in space. To this end, we propose a method of designing a revactile template based on a chaff matrix. Pseudo-points are generated by the constituent elements of the original feature vector, the pseudo-points are inserted into the original features according to the positioning matrix, and the variation of the distance between the feature vector and the template before and after the insertion is the same under the Euclidean distance criterion, so as to ensure the system recognition rate Feature protection. The experimental results verify the correctness of the method.