That is different from my understanding of the process, which was that the "receipt" was printed out and left with the voter rather than stored internally. As I recall, NO story I have seen about touch-screen voting has mentioned this rather critical key point.
If that's the way it works, and a paper hard copy is sealed within the machine, then I have no objections.
I have no idea if it's done that way everywhere but it does work that way at my polling place.