In view of the thievery of mobile phone and household security two hot issues,this paper proposed a new privacy protection model by using the ifne-grained permissions and privacy data tainting.When the mobile phone was stolen,the user can remote control the stolen-phone into hosted model,which can transmit the information of the thief to the previous-set phone number,including taking the pictures secretly and mailing the photo to the safe-mail,forwarding the messages and phone records to the safe-number,etc. Furthermore,by taking advantage of the lfexibility and mobility of mobile phone as a mobile monitoring station,with combination of hardware alarm system and external camera, user can remotely monitor the security of the area in time.This work also won the ifrst prize in the sixth session of the national information security competition in 2013.%针对手机被偷和家居安全两大热点问题提出了一套解决方案。设计了一套托管防盗及动态行为跟踪检测系统。手机被人盗窃后，用户可以远程开启托管模式，实时获取盗窃人的个人信息，包括后台拍照、短信转发、通话记录转发等，从而达到“以盗治盗”的效果。同时，利用手机的移动性灵活性作为一个移动的监控台，配上制作的硬件报警系统和外部摄像头，即可实现对远方某一区域的实时安全监控。本作品在安卓原生系统的手机上进行了以上功能的真机测试，试验结果基本达到预期功能指标。本作品也曾在2013年第六届全国信息安全大赛上获一等奖。
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