Abstract: With the rapid development of mobile Internet, the mobile payment and the mobile office will be integrated into people's lives. The protection of commercial secrets, personal privacy and other sensitive information becomes critical. However, a variety of information leakage, malicious tampering, system sabotage and other malicious behavior often occur. To compensate for the lack of Android system privacy protection, this paper designs a cell phone privacy data security solution based on an Android security policy, and implements privacy protection system of local and remote data protection. The system can effectively protect the user privacy data security and provide a secure mobile environment.

Key words: Android system, security policy, privacy protection, data encryption