Continual Keystroke Biometric Authentication on Short Bursts of Keyboard Input
Ned Bakelman, John Vincent Monaco, Sung-Hyuk Cha, Charles C. Tappert · 2012
This study focuses on intruder detection. Short bursts of keyboard input are analyzed to continually authenticate computer users and verify that they are the authorized ones. The biometric system consists of components for data capture, feature extraction, authentication classification, and ROC curve generation. Experiments were performed on three types of input: text, spreadsheet, and browser. For text input, system performance was obtained as a function of two independent variables: the population size and the number of keystrokes per sample. For each population size, the EER decreased roughly logarithmically as the number of keystrokes per sample was increased. The preliminary results on spreadsheet and browser input indicated considerably weaker performance and further research is required to determine the true biometric value of these types of input. 1.