Abstract
Mobile users typically provide their credentials once for authentication purposes. However, as long as the user remains active in the system, there are no mechanisms to verify whether the user who provides the credential is still in control of the device. In mobile device systems, the user's identity is checked only in the login stage. Continuous authentication based on the user's touch behavior patterns could be a remarkable solution to verify without disruption that a legitimate user is still in control of a mobile device. In this research, an Artificial Immune System (AIS) is proposed to continuously authenticate the users in the background based on the user's touch gestures. Experiments with Clonal Selection (CS) and Negative Selection (NS) are conducted on three datasets. Our results show that the best AIS performance is able to authenticate 99.89% of the users correctly.
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