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Recently, it is widespread for malware to collect sensitive information owned by third-party applications as well as to escalate its privilege to the system level (the highest level) on the Android platform. An attack of obtaining root-level privilege in an Android environment can form a serious threat to users from the viewpoint of breaking down the whole security system. This paper proposes a new scheme that effectively prevents privilege escalation attacks and protects users' personal information in Android. The authors' proposed scheme can detect and respond to malware that illegally acquires rootlevel privilege using pWhitelist, a list of trusted programs with root-level permission.
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