Analysis of Authentic Signatures and Forgeries

  • Katrin Franke
Part of the Lecture Notes in Computer Science book series (LNCS, volume 5718)


The paper presents empirical studies of kinematic and kinetic signature characteristics. In contrast to previous studies a more in-depth analysis is performed which reveals insides on differences and similarities of authentic and mimicked signing movements. It is shown that the signing behavior of genuine writers and impostors is only likely to differ in terms of local characteristics. Global characteristics can easily be imitated by skilled forgers. Moreover, it is shown that authentic writing characteristics cover a broad value range that might interfere with value ranges of unsophisticated forgeries. In our experiments signing behavior of 55 authentic writers and of 32 writers mimicking signature samples with three different levels of graphical complexity is studied. We discuss implications for ink-trace characteristics on paper and provide recommendations for implementing computer-based analysis methods.


signature verification handwriting behavior forensic examination combined on-/offline analysis 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2009

Authors and Affiliations

  • Katrin Franke
    • 1
  1. 1.Norwegian Information Security LaboratoryGjøvik University CollegeNorway

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