Quantum states were considered impossible to copy — but encryption changes the rules. Scientists have managed to create perfect quantum copies, locked with a one-time key, and proved the method works even on noisy quantum processors. This opens the door to reliable protection of quantum information.
🎯 Until 1982, physicists only suspected the no-cloning theorem. If unencrypted copying were possible, signals would travel [tag:speed_of_light]быстрее света[/tag] — directly violating relativity.