Title: PRISM: Policy-driven Risk-based Implicit locking for improving the Security of Mobile end-user devices
Authors: Ramakrishnan, Arun
Tombal, Jochen
Preuveneers, Davy
Berbers, Yolande
Issue Date: 2015
Conference: International Conference on Advances in Mobile Computing \& Multimedia edition:13 location:Brussels date:11-13 December 2015
Abstract: Nowadays, most mobile applications rely on device screen
locking mechanisms for ensuring practical security, which
expects the users to explicitly authenticate with a PIN or
biometric irrespective of the perceived threats. Owing to
this usability issues, many avoid using device locks potentially compromising the security. To overcome the limitations of this binary approach, we present an implicit authentication framework called PRISM (Policy-driven Risk-
based Implicit locking for improving the Security of Mobile
end-user devices). It provides risk based authentication by
detecting anomalies in the usual behavior patterns of the
users which include their expected locations, activities and application usage. Its device unlocking decisions are driven by policies that are defined either automatically by mining sensor data or manually by the end-users. Our experiments show that PRISM is able to discover useful behavior patterns efficiently even with limited data. The number of required explicit authentications is significantly reduced while assuring the preferred security for everyday scenarios.
Publication status: accepted
KU Leuven publication type: IC
Appears in Collections:Informatics Section

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