🎯 BB84 Protocol
- 1. Alice sends qubits with random bases
- 2. Bob measures in random bases
- 3. Basis comparison generates shared key
- 4. Eavesdroppers disrupt the system
🔐 Principles of Quantum Cryptography
Quantum cryptography leverages quantum mechanics to perform cryptographic tasks, enabling secure key exchange protocols like BB84 that are fundamentally secure against eavesdropping due to the no-cloning theorem.
// Quantum Key Distribution (BB84) - Core Concept
qubits ← encode_bits_with_bases(secret, random_bases_Alice)
bases_Bob ← measure_qubits_with_bases(random_bases_Bob)
shared_key ← validate_bases_and_correct_errors(bases_Alice, bases_Bob)
Quantum Key Exchange Simulation
Alice's Qubit Preparation
Bits: 0101
Bases: +x
Sent Qubits: [|0⟩, |1⟩, |0⟩, |1⟩]
Bob's Measurement
Chosen Bases: x+
Raw Key: 0110
Final Shared Key:
🔒 Waiting for simulation...
⚠️ Security Features
- Quantum No-Cloning Theorem
- Eavesdropper detection through error rates
- Information-theoretic security
- Quantum entanglement applications
🧪 Practical Applications
- Government secure communications
- Banking transaction security
- Quantum networks
- Crypto-quantum hybrid systems
🔬 Quantum Research Sandbox
Experiment with real quantum cryptography implementations using our quantum simulator framework.