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Multi-modal decision fusion for continuous authentication
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DOI：10.1016/j.compeleceng.2014.10.018.png)
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Active authentication is the process of continuously verifying a user based on their ongoing interaction with a computer. In this study, we consider a representative collection of behavioral biometrics: two low-level modalities of keystroke dynamics and mouse movement, and a high-level modality of stylometry. We develop a sensor for each modality and organize the sensors as a parallel binary decision fusion architecture. We consider several applications for this authentication system, with a particular focus on secure distributed communication. We test our approach on a dataset collected from 67 users, each working individually in an office environment for a period of approximately one week. We are able to characterize the performance of the system with respect to intruder detection time and robustness to adversarial attacks, and to quantify the contribution of each modality to the overall performance. (C) 2014 Elsevier Ltd. All rights reserved.
Keyword:
Multimodal biometric systems
Distributed communication
Security and privacy
Behavioral biometrics
Decision fusion
Active authentication
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