This bachelor thesis addresses the security of the Android system. It begins with the general overview of the operating system and system's architecture and its built-in security mechanisms. It describes how the system works and the system architecture, and also how the security mechanisms are built into the system. Next, comes the overview of the security of the Google Play marketplace. Permissions are explained as well as their pros and cons. Furthermore, the security mechanisms used for security check of the applications before they go to the marketplace are thoroughly analyzed. In the second part, an executed attack is presented and explained, followed by protection strategies. In the end, we sum up the findings and propose further research on this topic.
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