99
6
User Authentication: Keystroke Dynamics
with Soft Biometric Features
Soumen Roy and Devadatta Sinha
University of Calcutta
Calcutta, India
Utpal Roy
Visva-Bharati
Santiniketan, India
CONTENTS
6.1 Introduction ........................................................................................................................ 100
6.2 Related Works ..................................................................................................................... 101
6.3 Keystroke Dynamics ......................................................................................................... 105
6.3.1 Basic Idea ................................................................................................................. 105
6.3.2 Science ..................................................................................................................... 105
6.3.3 Features ................................................................................................................... 105
6.3.4 Keystroke Dynamics as User Authentication .................................................... 106
6.3.5 Advantages ............................................................................................................. 106
6.3.6 Disadvantages ........................................................................................................ 106
6.3.7 Application Areas .................................................................................................. 106
6.3.8 Security Issues ........................................................................................................ 106
6.3.9 Factors Affecting Performance ............................................................................ 106
6.4 Evaluation of Behavioral Biometric Techniques ............................................................ 107
6.4.1 Universality ............................................................................................................ 107
6.4.2 Uniqueness .............................................................................................................. 107
6.4.3 Permanence ............................................................................................................. 107
6.4.4 Collectability ........................................................................................................... 107
6.4.5 Performance ............................................................................................................ 107
6.4.6 Acceptability ........................................................................................................... 107
6.4.7 Circumvention ........................................................................................................ 108
6.5 Benchmark Soft Biometric Datasets on Keystroke Dynamics .................................... 108
6.6 Proposed Methodology ..................................................................................................... 108
6.6.1 Data Acquisition and Feature Extraction ........................................................... 108
6.6.2 Normalization and Feature Subset Selection .................................................... 110
6.6.3 Gender and Age Group Recognition .................................................................. 110
6.6.4 Classification and Decision .................................................................................. 112
6.7 Experimental Results ........................................................................................................ 112
6.8 Discussion ........................................................................................................................... 113
6.9 Conclusions ......................................................................................................................... 116
References ..................................................................................................................................... 116