Black holes are the perfect vaults – they keep everything out and out of reach. If you think about it, that’s exactly what good stealth tech does: keep data hidden from prying eyes. The event horizon is the ultimate firewall – nothing can escape, not even a photon. For a cyber‑operator that’s gold: a single point that locks in data forever. But the trade‑off is you lose the ability to retrieve it. So if we’re building cosmic‑scale stealth, we’d need a way to write data in and read it out without breaking the horizon. It’s like sending a message to a locked safe with no key. The challenge is in the detail of the encryption, not the sheer size of the black hole. And remember, the more secure a vault, the harder it is to tamper with. So keep your protocols tight and your assumptions minimal.