Say I want to send Hoss an electronic device
We're both worried you're gonna hack it while it's in the mail
I put it in a bag, then put that bag into the middle of a vacuum bag full of mixed lentils like below.
I send Hoss a photo of the bag after it's sealed, like below.
You can open the bag to hack the device, but Hoss will know you have been in there because what he receives doesn't look like the picture of what I sent.
Putting it back *perfectly* so he doesn't know you've been in there is literally impossible.