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Stability of a dynamic biometric signature created on various devices

The paper directly follows on from the prior research on the dynamic biometric signature (DBS), its properties, security, its resistance to forgery, and its stability. In our experiments, we used all the available pads produced by Signotec, which differ from each other in terms of their design, the size of the signature field, resolution, sampling rate, and even the scanning method used — a regular pen or a special pen using the ERT (Electromagnetic Resonance Technology). A less heterogenous sample was used than in the previous cases, as the objective of the experiments was to demonstrate a potential change in the DBS connected with the use of a different device, nevertheless the size of the sample means it is sufficiently statistically representative. The results showed that irrespective of the device used, the stability of scanning of the dynamic biometric signature was high for each person. The signature variability did not significantly differ between the devices for individual people. Once again it was confirmed that the use of the first signature as a “trial”, not included in the results, reduces the signature variability for each participant.