What Is “Quantum Supremacy” and Why It Sounds Scary “Quantum supremacy” refers to the point where quantum computers outperform classical ones at specific tasks. While this sounds abstract, the potential consequences are very real — especially for cryptography. Quantum algorithms likeShor’s could, in theory, break RSA and elliptic curve cryptography (ECC), the backbone of internet security.Grover’s algorithm can also weaken symmetric encryption by reducing brute-force resistance....