Irreversibility Analysis of Feature Transform-Based Cancelable Biometrics

  • Christian Rathgeb
  • Christoph Busch
Part of the Lecture Notes in Computer Science book series (LNCS, volume 8048)


Technologies of cancelable biometrics protect biometric data by applying transforms to biometric signals which enable a comparison of biometric templates in the transformed domain. Thereby biometric data is permanently protected, preventing identity fraud and privacy violation. The inversion of transformed biometric signals must not be feasible for potential attackers, i.e. irreversibility must be guaranteed.

In this work we propose a theoretical estimation of the irreversibility of generic cancelable biometric systems. Based on a general formalization of cancelable feature transforms the complexity of reverse engineering is evaluated, quantifying the security provided by the respective approach. In addition, examples are presented which clearly point at the security provided by existing approaches.


Biometrics template protection cancelable biometrics irreversibility analysis feature transforms 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Christian Rathgeb
    • 1
  • Christoph Busch
    • 1
  1. 1.da/sec Biometrics and Internet Security Research GroupHochschule DarmstadtDarmstadtGermany

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