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Which technology enables secure communication using quantum key distribution over fiber networks?
- 5G Encryption
- QKD
- Blockchain
- Homomorphic Encryption
Answer: QKD
QKD (Quantum Key Distribution) uses quantum physics principles to generate and share encryption keys with provable security. Deployed in limited metro networks (e.g., DRDO's QKD link). Challenges: distance limits, cost, and integration with existing infrastructure. Critical for future-proof cybersecurity questions.