Delivering an Earth-Shattering Discovery?

An anonymous reader asks: "Just for fun... suppose you've made an Earth-shattering discovery that, when revealed, will cause massive social upheaval. Maybe you've discovered a new energy source or weapon, or figured out how to factor large primes in seconds, or learned how to time travel back in time and affect the present. Being a nice guy, you decide to warn the world now and give everybody a few years to prepare before revealing the discovery. How can you absolutely encrypt or otherwise protect your discovery, but guarantee its revealing at a certain future date even if you and everybody you know is long gone? For example, could you bounce an electromagnetic signal describing the discovery off a celestial body several light-years away?"

Comments

factoring

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A couple steps:

1) Factor the revelation into multiple questions and comments.

2) Either submit them to "Ask Slashdot" or get them included in something like the Bible or Quran.