🔐 Quantum Key Distribution
Provably secure communication using quantum physics
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Quantum Cryptography
🔑 Unbreakable Key Exchange
Quantum Key Distribution (QKD) uses quantum mechanics to generate and distribute cryptographic keys with information-theoretic security. Unlike classical key exchange (Diffie-Hellman, RSA), QKD's security doesn't depend on computational hardness—it's guaranteed by the laws of physics.
💡 The Quantum Advantage
QKD exploits two quantum principles: no-cloning theorem (quantum states can't be copied) and measurement disturbance (observing a quantum system changes it). Any eavesdropper attempting to intercept the key introduces detectable errors.
QBER (no eavesdropper):<2%
QBER (eavesdropper present):>25%
🎯 What You'll Learn
🔐
BB84 & E91 Protocols
Foundation of quantum key exchange
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Practical Implementation
Hardware & distance limitations
🌐
Global QKD Networks
Deployed systems worldwide
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Quantum Internet Vision
Future of secure communication
🔒 Classical vs Quantum Key Distribution
🖥️Classical Methods
Security:Computational
Quantum-safe:No
Detection:None
⚛️QKD Methods
Security:Physical laws
Quantum-safe:Yes
Detection:Automatic