Shor vs Lattice: Post-Quantum Cryptography

Two vaults, two very different futures. The left vault is locked with today's RSA/ECC public-key cryptography; the right is locked with a lattice-based scheme from the new NIST post-quantum standards. Dial in a key size and hand a simulated attacker more logical qubits: switch on the quantum computer and watch Shor's algorithm find the hidden period of modular exponentiation, snapping the RSA tumblers open in a fraction of the time classical factoring would take — while the lattice vault's search probe keeps wandering, because no known quantum algorithm solves the underlying shortest-vector problem efficiently. This is the concrete reason migrating high-value data to lattice-based cryptography now, not later, matters.