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Applications of biometrics system are increasingly day by day as these methods provide more reliable and accurate way of identification and verification. Psychological studies indicate that people have a small but statistically significant ability to recognize the gait of individuals that they know. Gait biometrics is one of the recent biometrics systems which works on the shape and gesture of an individual walking style and comes under the category of behavioral biometric characteristics. The techniques used for gait recognition can be divided into two categories: holistic (feature/ appearance based) and model based. An overview of each gait recognition category is presented. The factors that may influence the gait recognition are also outlined here and security evaluations of gait biometrics under various attack scenarios are also presented.
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