When developing a HarmonyOS application, a developer receives the following product request: If a user...

The developer can do this with the help of UUIDs, because apps can use UUIDs to uniquely identify the same device during their lifetime

If the developer borrows the UUID to achieve the above requirements, the UUID logo will still exist after the application is uninstalled.

The developer can do this with the help of DVID, because the application can access and manage distributed devices based on the DVID

If you use a DVID to achieve the above functions, the DVE is strongly associated with your HarmonyOS account and application information, so you can prevent other applications from accessing the current application data.