## 9.2\. UID and Process Isolation

Device implementations:

*    [C-0-1] MUST support the Android application
sandbox model, in which each application runs as a unique Unixstyle UID
and in a separate process.
*    [C-0-2] MUST support running multiple applications
as the same Linux user ID, provided that the applications are properly signed
and constructed, as defined in the [Security and Permissions reference](http://developer.android.com/guide/topics/security/permissions.html).