If it doesn't matter, then let the secret be me thinking of a number, and you finding out the number. To escape discovery, I don't think of it until I'm beyond the event horizon of a black hole. As long as you don't count blindly guessing correctly as knowing the secret, I'm good.
Brain teaser time... prove you aren't a brainlett
Eli Sanchez
Chase Parker
you tell everyone the secret, it can't be leaked if everyone already knows.
get outsmarted brainlet
Ryan Sullivan
destroy the secret and everyone who knows it.
Connor Watson
destroy everyone who is able to comprehend the secret (right now or in future).
Joshua Torres
dropping the secret into a black hole,
the information is lost forever