Christian Rathgeb, PhD

Position: PostDoc
Office: D19 room 2.02
Email: christian.rathgeb -at- {,}
Telephone: +49 6151 16 30085

Christian Rathgeb received his MSc and PhD degrees (both in Computer Science) from the University of Salzburg, Austria, in 2009 and 2012, respectively. Since 2012 he is a postdoctoral researcher at the Center for Advanced Security Research Darmstadt (CASED), Germany. His research interests are mainly focused on biometrics.

Research Interests

  • Biometrics
  • Iris Recognition
  • Template Protection
  • Biometric Ageing

Current Offerings

For a list of further currently offered bachelor- and master theses, please have a look at this page. If you may have a specific topic related to my research interests in mind that is not listed on the aforementioned page, please get in touch with me by email.



  • USIT – University of Salzburg Iris Toolkit v2.0 is a Windows/Linux software package for iris recognition which comprises algorithms for (1) iris pre-processing, (2) feature extraction, and (3) feature comparison.



  •  Christian Rathgeb, Andreas Uhl, Peter Wild, „Iris Recognition: From Segmentation to Template Security“, In Advances in Information Security 59. Springer, New York, 2012.

Journal Articles

  • Yen-Lung Lai, Zhe Jin, Andrew Beng Jin Teoh, Bok-Min Goi, Wun-She Yap, Tong-Yuen Chai, Christian Rathgeb, „Cancellable iris template generation based on Indexing-First-One hashing“, In Pattern Recognition (64), 2017.
  • Christian Rathgeb, Benjamin Tams, Johannes Wagner, Christoph Busch, „Unlinkable Improved Multi-Biometric Iris Fuzzy Vault“, In EURASIP Journal on Information Security, 2016.
  • Julien Bringer, Constance Morel, Christian Rathgeb, „Security analysis and improvement of some biometric protected templates based on Bloom filters“, In Image and Vision Computing, 2016.
  • Christian Rathgeb, Anika Pflug, Johannes Wagner, Christoph Busch, „Effects of image compression on ear biometrics“, In IET Journal on Biometrics, 5(3), 2016.
  • Marta Gomez-Barrero, Christian Rathgeb, Javier Galbally, Christoph Busch, Julian Fierrez, „Unlinkable and irreversible biometric template protection based on Bloom filters“, In Information Sciences, Vol. 370-371, pp. 18-32, 2016.
  • Stefan Billeb, Christian Rathgeb, Herbert Reininger, Klaus Kasper, Christoph Busch, „Biometric Template Protection for Speaker Recognition based on Universal Background Models“, In IET Journal on Biometrics, 4(2), 2015.
  • Frank Breitinger, Christian Rathgeb, Harald Baier, „An efficient similarity digests database lookup – a logarithmic divide and conquer approach“ In Journal of Digital Forensics, Security and Law (Special Issue: Proceedings of 6th International Conference on Digital Forensics & Cyber Crime, ICDF2C’14) 9(2), 2014.
  •  Christian Rathgeb, Christoph Busch, „Cancelable Multi-Biometrics: Mixing Iris-Codes based on Adaptive Bloom Filters“, In Elsevier Computers and Security 42(0), 2014.
  •  Christian Rathgeb, Frank Breitinger, Christoph Busch, Harald Baier, „On the Application of Bloom Filters to Iris Biometrics“, In IET Journal on Biometrics 3(1), 2014.
  •  Christian Rathgeb, „Towards Enhancing the Security and Accuracy of Iris Recognition Systems“, In Datenschutz und Datensicherheit, 2013:6, 2013.

Book Chapters

  • Christian Rathgeb, Andreas Uhl, Peter Wild, Heinz Hofbauer, „Design Decisions in an Iris Recognition SDK“, In Handbook of Iris Recognition (2nd Edition), Springer, 2016.
  • Nicolas Buchmann, Christian Rathgeb, Roel Peeters, Harald Baier, Christoph Busch, „BioPACE: Biometric-Protected Authentication Connection Establishment“, In Advances in Security and Privacy of Biometrics Systems, Cambridge Scholars Publishing, 2015.
  •  Christian Rathgeb, Andreas Uhl, Christoph Busch, „Ageing Effects and Implications for Biometric Template Protection“, In Age Factors in Biometric Processing, IET, 2012.
  •  Christian Rathgeb, Christoph Busch, „Multibiometric Template Protection: Issues and Challenges“, In New Trends and Developments in Biometrics, InTech, 2012.

Conference Papers

Technical Reports

  • Elakkiya Ellavarason, Christian Rathgeb, „Template Ageing in Iris Biometrics: A Cross-Algorithm Investigation of the ND-Iris-Template-Ageing-2008-2010 Database“, Hochschule Darmstadt, Technical Report Nr. HDA-da/sec-2013-001, March 2013.

A list of earlier publications can be found here.