Conversation

I want to see proof that you can *not* encapsulate data in such a way that it becomes indecipherable after a certain point in time.

You can always make a copy of the extracted data that will survive forever, but if this is inconvenient to do, especially on a massive scale, it would still ensure that most such data is destroyed before anyone tries to extract it.

Inert data that expires on its own would be handy for many things.