Quantum Computing

11. Quantum Frontier: Quantum Key Distribution (QKD) and Post-Quantum Cryptography

Aria Kenangan Aria Kenangan
📅 June 20, 2026
⏱️ 5 min read
🏷️ Policy, Infrastructure
Quantum Cryptography

Structural Mechanics

Under the ₹6,000-crore National Quantum Mission (NQM), India’s quantum technology focus has shifted toward securing strategic communication channels. This involves deploying Quantum Key Distribution (QKD) systems over fiber-optic networks and developing Post-Quantum Cryptography (PQC) algorithms. These systems rely on the fundamental laws of quantum mechanics—such as the no-cloning theorem—to detect eavesdropping on critical military and financial communication links.

Data-Driven Metrics

  • Transmission Distance: Academic-industry collaborations have demonstrated secure terrestrial fiber QKD over distances exceeding 150 kilometers at high secret key rates.
  • Entangled Photon Generation: Indigenous development includes high-brightness, entangled photon sources operating at telecom wavelengths (1550 nm).
  • Algorithmic Transition: The National Security Council Secretariat (NSCS) is testing legacy encryption migrations to lattice-based cryptographic algorithms to defend against future quantum decryption threats.

Strategic Vector

The DoT should establish a dedicated quantum-secured communications corridor connecting major administrative centers in New Delhi, ensuring resistance to quantum decryption.