Home▸Quantum Physics▸BB84 Quantum Key Distribution — Photon Basis Diagram (2D)

🔑 BB84 Quantum Key Distribution — Photon Basis Diagram (2D)

Step-by-step 2D BB84 quantum key distribution simulator: watch Alice's photons travel through random rectilinear/diagonal bases to Bob, with an optional eavesdropper Eve whose intercept raises a detectable quantum bit error rate.

Quantum Physics2DModerate60 FPS📱 Mobile-adapted⇄ 3D version

Details

CategoryQuantum Physics

RenderingCanvas 2D

DifficultyModerate

Target FPS60

ControlsRun button — generate and reveal a full protocol round, Step button — advance one photon at a time through the diagram, Reset button — clear the diagram and statistics, Photons slider — set the number of qubits sent (6-32), Eve toggle — turn the eavesdropper on or off, Eve intercept-probability slider — set the fraction of photons Eve measures

quantum cryptographyBB84key distributionpolarizationeavesdropper detectionno-cloning theorem

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⚙ Under the hood

A step-by-step 2D diagram of the BB84 quantum key distribution protocol: Alice's photons travel through randomly chosen rectilinear and diagonal polarization bases to Bob, and bits where their bases match are sifted into a shared secret key. Toggle an eavesdropper, Eve, with an adjustable intercept probability to see how her measurements raise the quantum bit error rate and reveal her presence.

quantum cryptographyBB84key distributionpolarizationeavesdropper detectionno-cloning theorem

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install