Small-angle approximation attack on angle-based many-to-one functions for biometric templates

Zhe Jin, Bok Min Goi, Andrew Beng Jin Teoh, Yong Haur Tay, Pan Zheng

Research output: Chapter in Book/Report/Conference proceedingConference PaperOtherpeer-review


If a biometric template is compromised, the invasion of user privacy is inevitable. Since human biometric is irreplaceable and irrevocable, such an invasion implies a permanent loss of user identity. As a result, many transformation methods are proposed to convert the biometric template into non-invertible version of itself. However, if the transformation functions are not carefully designed, the 'non-invertible' templates are susceptible to be partially or fully invertible. In this paper, we proposed a template inversion technique, namely small-angle approximation attack, which is less studied in the literature. We reveal that the angle-based many-to-one property of the non-linear functions is highly vulnerable to small-angle approximation attack.

Original languageEnglish
Title of host publication2015 IEEE International Conference on Consumer Electronics - Taiwan, ICCE-TW 2015
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages2
ISBN (Electronic)9781479987443
Publication statusPublished - 20 Aug 2015
Externally publishedYes
EventIEEE International Conference on Consumer Electronics-Taiwan 2015 - Taipei, Taiwan
Duration: 6 Jun 20158 Jun 2015
Conference number: 2nd (Proceedings)


ConferenceIEEE International Conference on Consumer Electronics-Taiwan 2015
Abbreviated titleICCE-TW 2015
Internet address


  • Accuracy
  • Approximation algorithms
  • Approximation methods
  • Biomedical imaging
  • Fingerprint recognition
  • Privacy
  • Transforms

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