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计算机工程 ›› 2012, Vol. 38 ›› Issue (04): 236-238. doi: 10.3969/j.issn.1000-3428.2012.04.077

• 开发研究与设计技术 • 上一篇    下一篇

基于Chaff Matrix的可撤销声纹模板设计

徐文华,易法令,熊 伟   

  1. (广东药学院医药信息工程学院,广州 510006)
  • 收稿日期:2011-09-20 出版日期:2012-02-20 发布日期:2012-02-20
  • 作者简介:徐文华(1978-),男,讲师、博士,主研方向:生物认证系统,语音信号处理;易法令,教授、博士;熊 伟,讲师、硕士
  • 基金资助:
    广东药学院人才引进基金资助项目(2007YGY01)

Design of Cancelable Voiceprint Template Based on Chaff Matrix

XU Wen-hua, YI Fa-ling, XIONG Wei   

  1. (College of Medical Information Engineering, Guangdong Pharmaceutical University, Guangzhou 510006, China)
  • Received:2011-09-20 Online:2012-02-20 Published:2012-02-20

摘要: 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。

关键词: 声纹认证, 可撤销模板, 模糊穹, 生物加密, 超球体, 梅尔倒谱系数

Abstract: Aiming at the problems of fake and decrease of interspaces in Fuzzy Vault(FV) method, this paper proposes a voiceprint template protection method based on Chaff Matrix(CM). The CM is generated from raw feature and interweaved with raw template according to Orientation Matrix(OM), such that a cancelable template is designed to protect the voiceprint. Problems of fake and decrease of interspaces for Chaff Points(CPs) in FV are solved by the mixture on a thinner layer. Mathematical analysis explained the proposal doesn’t deteriorate the performance, for the invariability of the distance change between features. Experimental results show the validity of this method.

Key words: voiceprint authentication, cancelable template, Fuzzy Vault(FV), biometric encryption, hypersphere, Mel Frequency Cepstral Coefficient(MFCC)

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