Research Article
On-line Signature Verification on a Mobile Platform
@INPROCEEDINGS{10.1007/978-3-642-29336-8_28, author={Nesma Houmani and Sonia Garcia-Salicetti and Bernadette Dorizzi and Mounim El-Yacoubi}, title={On-line Signature Verification on a Mobile Platform}, proceedings={International Workshop on Mobile Security}, proceedings_a={MOBILE SECURITY}, year={2012}, month={10}, keywords={Online signature verification PDA device Mobile conditions Hidden Markov Models}, doi={10.1007/978-3-642-29336-8_28} }- Nesma Houmani
Sonia Garcia-Salicetti
Bernadette Dorizzi
Mounim El-Yacoubi
Year: 2012
On-line Signature Verification on a Mobile Platform
MOBILE SECURITY
Springer
DOI: 10.1007/978-3-642-29336-8_28
Abstract
This paper concerns the implementation of our online signature verification system on a mobile device. Verification involves confirming or denying a person‘s claimed identity. Our system is based on a Hidden Markov Model and outputs two complementary scores: the first one is related to the likelihood given by the HMM of the claimed identity; the second one is related to the segmentation given by such an HMM on the input signature. A claimed identity is confirmed when the arithmetic mean of the two scores obtained on such an input signature is higher than a threshold. Also, a personal normalization of the local parameters of the signature is carried out to make the system robust to changes of platforms. A patent was submitted with special emphasis on the latter claim. This system is implemented on a mobile platform PDA Qtek 2020 ARM 400 MHz. An acquisition interface is developed allowing an enrollment step of a person by acquisition of 5 of his/her signatures, and a verification step of a given signature of a registered person. Enrolment speed depends on the complexity of the signature, while verification is performed in real time. Performance assessment of our system, carried out on two databases acquired on a PDA, shows a degradation of system performance on mobile platform compared to a fixed platform. In order to improve the performance in the case of mobility, we propose a strategy for enhancing the quality of the reference signatures at the enrolment phase.