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Sansad TV | Published on August 16, 2025
Samvaad: Interview with Prof. Bhaskar Kanseri, Chair Professor, Dept. of Physics, IIT-D |16 Aug,2025
In a landmark scientific breakthrough, India has taken a decisive step into the quantum future. In June this year, researchers at IIT Delhi, under the leadership of Professor Bhasker Kanseri, successfully demonstrated quantum entanglement-based free-space Quantum Secure Communication - a first of its kind in the country over a distance of more than one kilometer.The experiment, conducted under the DRDO-Industry-Academia Centre of Excellence, marks a new era in secure communications and also strengthens India's position in the global quantum race. Today, we are joined by the scientist leading this breakthrough - Professor Bhasker Kanseri –
who will talk to us about the achievement, the challenges he and his team faced while carrying out the experiment, and what the breakthrough means for India's future in quantum technologies.
Guest: Prof. Bhaskar Kanseri, Chair Professor, Dept. of Physics, Indian Institute of Technology Delhi (IIT-D)
Anchor: Teena Jha, Producer: Sagheer Ahmad
India’s Quantum Leap: IIT-Delhi Achieve Secure 1 km Free-Space Quantum Communication
Vajiram & Ravi | Published on Jun 22, 2025
Recently, the Ministry of Defence announced that IIT-Delhi and DRDO scientists successfully demonstrated quantum communication over a distance of more than 1 km in free space, marking a major breakthrough in quantum cybersecurity....
Sponsored Research and Consultancy Office IITH | Published on Feb 21, 2024
IInvenTiv 2024 DS4: Quantum Secure Communication (IIT Delhi)
The quantum era is approaching, and quantum computers are already being developed. In this scenario, current cryptography methods are prone to be broken and compromised. Quantum key distribution (QKD) offers the new generation security solution, which does not rely on computationally complex problems and utilizes laws of quantum Physics for generation and distribution of keys. This technology of national importance promises to transform the field of cryptography by providing an information-theoretic level of provable security, which is impossible to break even for quantum computers. This cyber-security solution would have major impact in securing
defence sector, banking, mobile and payment sector, data centres, and other strategic areas. We have been developing single and entangled photon-based telecom compliant QKD technologies, which can share keys using existing telecom grade fibre infrastructure. Recently, we have shown first intercity quantum secure communication in India between Prayagraj and Vindhyanchal for more than 100km underground fibre using phase encoding QKD. This scheme has been further optimized for longer secure distance and low QBER leading to globally longest distance (380km) fibre QKD using differential phase shift (DPS) protocol. QKD using quantum entanglement tolerates higher channel loss, is more robust to environmental fluctuations, provides extra layer of security and very high randomness, and simplifies the quantum key analysis. In this exhibit, we demonstrate a prototype of entanglement distribution using 50km telecom grade fibre, which can be used for quantum key generation and highly secure key exchange between users. We aim to reduce the need of trusted nodes for enabling long distance quantum secure communication networks.
IIT Delhi achieves QKD for 380 km in standard telecom fiber
The Hans India | Published on Oct 6, 2023
New Delhi: In a recent experimental breakthrough on secure quantum communication, researchers at IIT Delhi have achieved a trusted-node-free quantum key distribution (QKD) up to 380 km in standard telecom fiber with a very low quantum bit error rate (QBER).
The IIT Delhi said that this long secure length is the highest achieved so far...
India enters the “Quantum Key Distribution” club
Analytics India Magazine | Published on March 4, 2022
Quantum key distribution works by transmitting millions of photons (polarised light particles) over a fibre optic cable from one entity location to another to create a bitstream of ones and zeroes. Social media was abuzz upon the news of successful testing of quantum key distribution in India. While it is beyond a layman’s understanding, congratulations were poured in for DRDO IIT-Delhi for this unique achievement.
देश में पहली बार 'क्वांटम की डिस्ट्रीब्यूशन लिंक' का सफल परीक्षण, जानें इस तकनीक के क्या होंगे लाभ
Jagran Prakashan | Published on Feb 24, 2022
भारत में पहली बार 'क्वांटम की डिस्ट्रीब्यूशन लिंक' का सफलतापूर्वक परीक्षण किया गया। DRDO और IIT-दिल्ली के विज्ञानियों की संयुक्त टीम ने उत्तर प्रदेश में प्रयागराज और विंध्याचल के बीच 100 किलोमीटर से अधिक की दूरी के बीच क्वांटम की (कुंजी) डिस्ट्रीब्यूशन लिंक का सफलतापूर्वक प्रदर्शन किया। रक्षा अनुसंधान और विकास संगठन (DRDO) ने इस बारे में जानकारी दी है।
EMERGING TECHNOLOGIES: IIT Delhi researchers achieve secure quantum communication for 380 km in standard telecom fiber
Education Times | Published on Oct 7, 2023
This long secure length is highest achieved so far, not only in India but first globally for DPS QKD protocol. Scientists at Indian Institute of Technology (IIT) Delhi have achieved a trusted-node-free quantum key distribution (QKD) up to 380 km in standard telecom fiber with a very low quantum bit error rate (QBER). According to the institution, this long secure length is the highest achieved so far, not only in India but first globally for the Differential Phase Shift (DPS) QKD protocol, keeping IIT Delhi at the forefront of research and development in quantum communication technologies
IIT-Delhi researchers achieve secure quantum communication for 380 km in standard telecom fiber
The Hindu | Published on Oct 5, 2023
“It paves ways for more secure long distance communication useful for strategic areas such as defence and online banking, making digital transactions safer in the near future.” IIT-Delhi researchers have achieved an experimental breakthrough on secure quantum communication up to a distance of 380 kilometres in standard telecom fiber with a very low error rate that can be helpful in securing financial transactions and secret codes.
IIT-Delhi Researchers Achieve Secure Quantum Communication For 380 Km In Standard Telecom Fiber
Jagran Prakashan | Published on Oct 5, 2023
IIT-Delhi Researchers' extended secure communication range is not only a national milestone but also a global one for the Differential Phase Shift (DPS) Quantum Key Distribution (QKD) protocol, marking a major breakthrough in quantum communication technology.Researchers at the Indian Institute of Technology (IIT) Delhi have successfully demonstrated secure quantum communication over a remarkable distance of 380 kilometers through standard telecom fiber, boasting an impressively low error
India enters the “Quantum Key Distribution” club
Janes | Published on Feb 28, 2022
India, for the first time, has demonstrated Quantum Key Distribution (QKD) links over a distance of more than 100 km, the Indian Ministry of Defence (MoD) has said. According to a media release by the MoD on 23 February, this QKD capability was demonstrated between the cities of Prayagraj and Vindhyachal, both in the northern state of Uttar Pradesh.