Operation BB84

Mission 5: Quantum Key Distribution. Part of the Quantum Courier Service, a free course from the Oxford University Quantum Information Society.

You’ve survived the physics lessons, Recruit. You understand that qubits collapse when measured (Module 1). You know that asking the wrong question destroys the answer (Module 2). You proved that perfect forgery is physically illegal (Module 3). And you built a telepathic burglar alarm (Module 4).

The Echo Network is currently weeping into their oscilloscopes. Now, it is time to go on the offensive.

We are not just going to study quantum weirdness anymore. We are going to weaponize it. Your mission is to establish a communication channel so secure that the laws of thermodynamics will freeze over before the Echo Network can read our mail.

Welcome to Quantum Key Distribution (QKD). This is how we win the war.