A multimodal-Siamese Neural Network (mSNN) for person verification using signatures and EEG

Debashis Das Chakladar, Pradeep Kumar, Partha Pratim Roy, Debi Prosad Dogra, Erik Scheme, Victor Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Signatures have long been considered to be one of the most accepted and practical means of user verification, despite being vulnerable to skilled forgers. In contrast, EEG signals have more recently been shown to be more difficult to replicate, and to provide better biometric information in response to known a stimulus. In this paper, we propose combining these two biometric traits using a multimodal Siamese Neural Network (mSNN) for improved user verification. The proposed mSNN network learns discriminative temporal and spatial features from the EEG signals using an EEG encoder and from the offline signatures using an image encoder. Features of the two encoders are fused into a common feature space for further processing. A Siamese network then employs a distance metric based on the similarity and dissimilarity of the input features to produce the verification results. The proposed model is evaluated on a dataset of 70 users, comprised of 1400 unique samples. The novel mSNN model achieves a 98.57% classification accuracy with a 99.29% True Positive Rate (TPR) and False Acceptance Rate (FAR) of 2.14%, outperforming the current state-of-the-art by 12.86% (in absolute terms). This proposed network architecture may also be applicable to the fusion of other neurological data sources to build robust biometric verification or diagnostic systems with limited data size.

Original languageEnglish
Pages (from-to)17-27
Number of pages11
JournalInformation Fusion
Early online date19 Jan 2021
Publication statusPublished - 1 Jul 2021

Bibliographical note

© 2021, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funding Information:
Prof Chang’s research is partly supported by VC Research (number: VCR 0000050 ). Dr. Scheme’s research is partly supported by the New Brunswick Innovation


  • CNN
  • EEG
  • LSTM
  • Multimodal
  • Siamese Neural Network
  • User verification


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