Article 3: Quantum-safe thinking
Why in news: The DST Task Force released a report recommending India’s transition to quantum-safe digital systems through post-quantum cryptography (PQC) and quantum key distribution (QKD) to counter future cybersecurity threats from quantum computers.
Key Details
- Quantum computers could break current public-key cryptography using algorithms like Shor’s algorithm.
- Public-key infrastructure secures systems such as HTTPS, telecom networks, banking, and defence communications.
- The report warned about “harvest now, decrypt later” cyber threats targeting encrypted data.
- It recommended adoption of Post-Quantum Cryptography (PQC) standards finalised in 2024.
- India may require over ₹5,000 crore investment for infrastructure upgrades, interoperability, and skilled manpower development.
Growing Quantum Threat to Cybersecurity
- The DST Task Force highlighted the urgent need to make India’s digital ecosystem quantum-safe.
- Present-day public-key cryptography protects online identity, banking, and secure communication systems.
- These systems rely on mathematical problems that ordinary computers cannot solve efficiently.
- Powerful quantum computers could break such encryption rapidly using algorithms like Shor’s algorithm.
- Critical systems such as HTTPS, telecom networks, and digital infrastructure remain highly vulnerable.
Rise of Post-Quantum Cryptography (PQC)
- Post-Quantum Cryptography (PQC) refers to encryption methods resistant to quantum-computing attacks.
- Unlike quantum computers, PQC software can operate on existing conventional systems.
- The report recommended adoption of three post-quantum standards finalised in 2024.
- India has been advised to begin gradual migration towards quantum-resistant architecture.
- Priority sectors include financial services, defence, power grids, and critical infrastructure.
Threat of “Harvest Now, Decrypt Later”
- Cybercriminals may collect encrypted information today and decrypt it later using future quantum computers.
- This creates an immediate security challenge even before the arrival of “Q-day”.
- “Q-day” refers to the point when quantum computers can practically break current encryption systems.
- Experts differ on the timeline, though many estimate it could take another decade.
- Delaying preparation could expose sensitive government and commercial data to future risks.
Challenges in India’s Quantum Transition
- Migrating to quantum-safe systems involves complex upgrades across databases, legacy hardware, and software networks.
- Existing authentication systems and control infrastructure may face interoperability difficulties.
- The report warned that advanced Artificial Intelligence (AI) already threatens software security today.
- India may require at least ₹5,000 crore for infrastructure modernisation and cybersecurity upgrades.
- Dependence on foreign vendors and shortage of skilled QKD engineers remain major concerns.
Quantum Key Distribution (QKD) and the Way Forward
- The report also recommended wider adoption of Quantum Key Distribution (QKD) for highly sensitive environments.
- QKD offers stronger security guarantees but is technically demanding and expensive.
- Policymakers must balance security requirements with operational efficiency.
- India needs to invest in human capital development, research, and domestic innovation in quantum technologies.
- Periodic reassessment of cybersecurity needs will be essential as quantum technology evolves globally.
Conclusion
India’s transition to quantum-safe cybersecurity is essential for protecting critical infrastructure and national security in the emerging quantum era. Timely adoption of PQC and selective use of QKD, along with investments in technology, infrastructure, and skilled professionals, will strengthen long-term digital resilience against evolving cyber threats.
EXPECTED QUESTION FOR PRELIMS:
Q. In Quantum Key Distribution, the communication key is generally transmitted through:
(a) Radio waves
(b) Quantum particles such as photons
(c) Magnetic tapes
(d) Copper wires only
Answer: b