An idea is an abstract concept, and hence not tangible. Therefore it cannot be officially protected, for example by means of a copyright or a patent. What you can do, however, is deposit your idea in the form of an i-DEPOT that links your idea to a time stamp. Make no mistake: the only thing this proves is that you may have been the first one to have come up with the idea. It is only when you start working out your idea practically that it can be protected legally.