How to protect video offline?

Question

Programming

There is a *.mp4 file, you need to make *.exe out of it, but at startup a request should pop up with the Email input field, the address is checked in the file or database, if it exists, it sends the generated combination of characters to 30 and waits for confirmation, you need to use soap take the code, enter it, and it is valid for 24 hours, how is it possible to implement this, any ideas?

Answer 1

Your question about offline encryption doesn't make sense. the procedure for obtaining a video clip and a code via online.
The easiest way is to zip the file and send a link to it to the client. Each client has a unique link and a unique archive. Only places this approach will eat an unrealistic amount.
Just make a website and the delivered app is a stupid browser window with no navigation. You can stick it on anything. It will be easier, cheaper and more flexible.

Answer 2

Well, in general, write a program like this.
Encrypt the video file with a key.
Email sent via SMTP
The only thing is that in all copies of the program, the video will be encrypted with the same key. This is bad.
As an option - upload encrypted video from the server (each client with its own key).