Abstract
Now, as the security threats for the Android phone increasing, the security problem about the smart mobile-phone has become a focus of the topic. In this paper, we take the security problems on Android operating system as the study object .Our contribution in this paper is two-fold. First, SQLite database is the mainly way for data storage on Android, but no security mechanism was provided in SQLite, we implement data encryption technique refer to the common database security mechanism. Second, in order to solve the security threats existing in the traditional phone, we also give a design and implementation of multi-function mobile phone firewall.
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