> Of course, then we just give all those permissions back to any apps that ask for them. At least in the case of Android, there is no permission that will give

> Of course, then we just give all those permissions back to any apps that ask for them. At least in the case of Android, there is no permission that will give you access to the root filesystem or other apps' sandboxes. Categorically not allowed. App data is restricted to /data/data/$PACKAGE_NAME. The rest of internal storage is either read-only or completely off-limits (especially in the case of other apps' data). The only way to access data that belongs to other apps is to share the same developer signing key, or explicitly share the data using a content provider. The only exception is external storage (the SD card, if present). But that's because SD cards use FAT and therefore can't support per-application permissions.