Context-aware user authentication has become a necessary tool to serve as an additional security perimeter to protect online identities.By learning about user’s online behavior over time,authentication system are able to establish user behavior profile. Any substantial deviation on login context from the profile would indicate a high risk login attempt. Such adaptive authentication system has been developed in production server where user login records for more than six months have been collected. In this paper, the analysis of the user login context is presented.
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