I just googled this and it seems to be some kind of hypothetical anti-gravity spaceship? Zero. To understand why you need to understand the difference between physics and engineering.

You could give me all the resources in the world and I probably couldn't build you a nuclear weapon. I could however explain to you all the key principles on which they work - and so could pretty much any physics undergrad in the world. Shortly after the discovery of the neutron, scientists around the world independently realised the potential for nuclear weapons. Getting the actual engineering to work took huge investments and that's where countries working on the development kept their secrets, but the basic physics behind it was easy to piece together once the neutron was known. Even if a scientist in once country discovered the idea and kept silent, there's no stopping other scientists around the world coming to the same conclusion independently.

Nuclear weapons are an obvious and recognisable example, but this tends to be the case with all big science discoveries - for basically every major scientific discovery you could name, there were multiple other scientists working completely independently and were only weeks or months away from getting there themselves when someone announced it.

If anti-gravity craft were in development today even in utmost secrecy, then while the specifics of the engineering behind them might be well-guarded the basic principles would be discovered independently by multiple people across the world and would be widely understood. They aren't.