Google Android is a smart phone operating system that is gaining more and more popularity. Due to its developer openness, new concepts and approaches can be easily deployed to devices. Additionally, the source code of Android is set open source allowing developers to modify even components of the operating system. Android introduces new security concepts while a full scale audit needs to be made for estimating effectiveness and impact of additional security measures.
Knowing about the effectiveness of the security model of Android will allow to design and develop a layered security concept. In this concept, different layers of security will restrict access to different domains, e.g. applications, data, or services. Entering a higher level security domain will trigger an authentication process, where the security of each authentication method will increase corresponding to the increasing security level.
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