Smartphones host operating systems that are on a par with modern desktop environments. For example, Google Android is a mobile operating system that is based upon a modified version of the Linux OS. Notwithstanding traditional threats to mobile phones, threats to desktop environments are also applicable to smartphones. Management of security configurations for the end-user has, to date, been complex and errorprone. As a consequence, misconfiguration of and/or a poor understanding of a security configuration may unnecessarily expose a smartphone to known threats. In this paper, a threat-based model for smartphone security configuration is presented. To evaluate the approach, a prototype smartphone security agent that automatically manages security configurations on behalf of the end-user is developed. A case study based on firewall access control demonstrates how automated security configuration recommendations can be made based on catalogues of countermeasures. These countermeasures are drawn from best-practice standards such as NIST 800-124, a guideline on cell phone and PDA security and NIST 800-41-rev1, a guideline on firewall security configuration.
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