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Hi,
I have an app which has been uploaded to the windows store. The app actually is exposing the DLL which I'm concerned about. As seen there is an EFS method which locks and encrypts the DLL and thus doesn't allow users to relocate(Copy) the DLL. But once we create the AppxBundle(Publish in visual studio) the file seems to be normal without any encryption. I would like to know if there are any other ways to secure the DLL from copying it from the WindowsApp folder in ProgramFiles on the installed PC or the correct way to achieve EFS of the DLL.
Thank you
Hi @vishal bs
Welcome to Microsoft Q&A!
How do you choose the distribution method when publishing the project?
Hi Junjie Zhu,
Thanks for the reply. I just followed the normal windows app submission process. I used EFS to padlock my DLL on my side before creating an AppxBundle assuming it will not be copied or making it read-only even after installing the application using appxbundle. But it didn't work as I expected.
Hi Junjie Zhu,
Thanks for the reply, I followed the normal Windows store app submission process. I did an EFS padlock for the DLL on my side before distribution of the app assuming that the AppxBundle created will hold that EFS on the DLL. But after installation it didn't work as I expected.
Hi @vishal bs ,
If you are trying to send your package to the Store, the Store will decompress, recompile your packaged file and encrypt it on the cloud when you upload the Appx file, and the customer downloads the encrypted project from the cloud.
Yes! But the padlock which I did specifically not allow it to be copied to any other folder fails in this case.
All I want is to make sure that my app when installed the DLL has the locked symbol tile similar to the attached image.Screenshot (7).png
This seems to need to be encrypted again after installation, I will discuss this with the team.
The user should not be doing anything after installation is what my concern is. Whenever he downloads the app from app store the Windows Apps folder in program files should contain files(DLL, exe) with this icon which protects it from being copied to anywhere else. I have seen few apps do that but I'm unable to achieve the same.
Hi @vishal bs ,
I will discuss with the team whether this is feasible.
Hi @vishal bs ,
I have discussed with the team.
According to the current official information, UWP does not support this.
Some apps can do it, may not be a UWP, or use non-UWP API.
You may try to encrypt the file again after installation.
Thank you.