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GS3 · Quantum

DRDO-IIT Delhi entanglement-based quantum link

1 min readQuantum
Battle IAS current affairs title card: DRDO-IIT Delhi entanglement-based quantum link (GS3 · Quantum, 16 June 2025)

What happened

  • DRDO and IIT Delhi demonstrated free-space quantum secure communication using entanglement over more than 1 km [PIB].

Background

  • Secure key rate was about 240 bits/s with error rate under 7% [PIB].

Why it matters

  • Quantum keys resist future decryption.

How to use this in Mains

GS-III Science and technology: IT, computers, robotics, indigenisation

  1. As per PIB (2025-06-16): DRDO and IIT Delhi demonstrated free-space quantum secure communication using entanglement over more than 1 km.
  2. Quantum keys resist future decryption.
Quotable data point

DRDO and IIT Delhi demonstrated free-space quantum secure communication using entanglement over more than 1 km.

PIB: Quantum secure communication, 16 Jun 2025

Exam angle

UPSC

Prelims: QKD.

Practice MCQs

Original practice questions (not PYQs).

Practice · UPSC

Distance of the entanglement link

Answer (b) & explanation

PIB.

Go deeper

ExplainerQuantum Computing: Qubits, Superposition and Entanglement, Applications, Quantum Communication and India’s National Quantum Mission (UPSC Notes + PYQs)

Official source: PIB: Quantum secure communication, 16 Jun 2025

facts from cited sources only; faculty review pending