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    Finger-drawn signature verification on touch devices using statistical anomaly detectors

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    Authors
    Al-Khafaji, Shawq S.
    Al-Jarrah, Mudhafar M.
    Amin, Saad
    Feng, Xiaohua
    Affiliation
    University of Bedfordshire
    Middle East University
    Alkhawarizmi International College
    Issue Date
    2020-04-09
    Subjects
    skilled forgery
    graphic signature
    Z-score
    EER
    anomaly detector
    authentication
    random forgery
    
    Metadata
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    Abstract
    The use of behavioral biometrics in user authentication has recently moved to new security application areas, one of which is verifying finger-drawn signatures and PIN codes. This paper investigates the design of anomaly detectors and feature sets for graphic signature authentication on touch devices. The work involved a selection of raw data feature sets that are extracted from modern mobile devices, such as finger area, pressure, velocity, acceleration, gyroscope, timestamp and position coordinates. A set of computed authentication features are formulated, derived from the raw features. The proposed anomaly detector is based on the outlier method, using three versions of the Z-Score distance metric. The proposed feature sets and anomaly detectors are implemented as a data collection and dynamic authentication system on an Android tablet. Experimental work resulted in collecting a signature dataset that included genuine and forged signatures. The dataset was analyzed using the Equal-Error-Rate (EER) metric. The results for random forgery and skilled forgery showed that the Z-Score anomaly detector with 3.5 standard deviations distance from the mean produced the lowest error rates. The skilled forgery error rates were close to random forgery error rates, indicating that behavioral biometrics are the key factors in detecting forgeries, regardless of pre-knowledge of the signature's shape.
    Citation
    Al-Jarrah MM, Al-Khafaji SS, Amin S, Feng X (2019) 'Finger-drawn signature verification on touch devices using statistical anomaly detectors', IEEE SmartWorld, Ubiquitous Intelligence & Computing, Advanced & Trusted Computing, Scalable Computing & Communications, Cloud & Big Data Computing, Internet of People and Smart City Innovation - Leicester, Institute of Electrical and Electronics Engineers Inc..
    Publisher
    Institute of Electrical and Electronics Engineers Inc.
    URI
    http://hdl.handle.net/10547/624211
    DOI
    10.1109/SmartWorld-UIC-ATC-SCALCOM-IOP-SCI.2019.00303
    Additional Links
    https://ieeexplore.ieee.org/document/9060212
    Type
    Conference papers, meetings and proceedings
    Language
    en
    ISBN
    9781728140346
    ae974a485f413a2113503eed53cd6c53
    10.1109/SmartWorld-UIC-ATC-SCALCOM-IOP-SCI.2019.00303
    Scopus Count
    Collections
    Computing

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