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Failure to place all privileged code together in one package and seal the package can lead to mix-and-match attacks.

Automated Detection

Detecting code that should be considered privileged or sensitive requires programmer assistance. Given identified privileged code as a starting point, automated tools could compute the closure of all code that can be invoked from that point. Such a tool could plausibly determine whether all code in that closure exists within a single package. A further check of whether the package is sealed is feasible.

Android Implementation Details

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