You can't keep a number secret; the asymmetry is too strong to break.

In the early 2000's the encryption key for DVDs leaked.

The powers that be tried to sue anyone who tried to publish the number.

But that was an impossibility.

My favorite example of the era was a t-shirt that enumerated all of the integers immediately before and after the encryption key, with the actual key's slot conspicuously empty.

The shirt underlined the absurdity of takedown notices for an integer.

Information wants to be free–because it is non-rivalrous and naturally viral.