Is there a solution to this authorization problem?

Question

I am developing a free mobile application that accesses a web service and regularly downloads some content from it.

I do not want to force users to create an account to use this web service, and it should be available to all users of this mobile application.

However, I do not want third-party users to access this web service and reuse the data it provides. In other words, only the mobile application that I am writing should be able to use the service, and no one else.

Is there a solution for this problem?

Answer 1

I think you could do something like this:

1)

2) /

3) ( "" : "" - )

4) [EDIT: ( /, ) < - NO, togheter: if , , , ... - id, END EDIT]

5) "" ( "" ) , , .

6), ... , - ...

: , ""... , "" , (php, javaScript...), ...

Answer 2

, , , -. , , / , .

CD- , .