National Resilience | Quantum-Secure Communication | Strategic Preparedness
The Sector at a Glance
Quantum communication uses the principles of quantum physics, such as superposition, entanglement and the fact that measuring a quantum state disturbs it, to transmit information in ways that reveal any attempt at interception. Its most mature application is Quantum Key Distribution (QKD), in which two parties generate shared encryption keys whose secrecy rests on physical law rather than on mathematical difficulty alone. The sector covered under this tab extends across fibre-based QKD networks, free-space and satellite-based quantum links, trusted-node and quantum repeater architectures, quantum random number generators, single-photon sources and detectors, entanglement distribution, and the longer-term vision of a quantum internet connecting quantum computers and sensors.
The scope of this tab also includes the companion transition to post-quantum cryptography, that is, classical algorithms designed to resist attack by future quantum computers, since a resilient national communication architecture will need both. It covers the full chain from photonic components, cryogenics and detectors, through system integration and network engineering, to standards, certification, key management and the institutional arrangements for operating secure networks. It is the indigenous mastery of this chain, and not the import of finished systems, that will determine whether Bharat's most sensitive communications remain secure in the quantum era.
Why This Sector Is Critical
The security of today's government, defence, financial and critical infrastructure communications depends heavily on public-key cryptography. A sufficiently capable quantum computer would be able to break many of these widely used schemes. Adversaries are believed to be able to collect encrypted traffic today in order to decrypt it later once such capability exists; this means that information with long-term sensitivity, such as defence plans, diplomatic communications, nuclear and strategic data, and citizens' sensitive records, is already exposed to a future threat. Quantum communication and post-quantum cryptography together form the response to this risk.
The structural vulnerability in this field is a double one. First, the critical components of quantum communication systems, including single-photon detectors, specialised lasers, low-loss optical components and cryogenic equipment, are produced by a small number of suppliers and are subject to export controls. Second, quantum systems introduce their own implementation weaknesses, and a QKD device that is poorly engineered or imported without verification can create a false sense of security. If Bharat relies on foreign quantum-secure equipment for its most sensitive links, it may simply move the point of dependency rather than remove it. It is argued that quantum-secure communication can only provide sovereignty if it is itself sovereign.
The Bharat Context
Bharat has made credible early progress. National laboratories and research institutions have demonstrated quantum key distribution over fibre and in free space, including over meaningful distances and between separate sites, and a research community in quantum optics and photonics has grown across several institutions. However, the field remains largely at the stage of demonstration. Domestic manufacturing of key photonic components and detectors is limited; field-deployed quantum networks serving operational users are few; testing and certification capability for quantum devices is still emerging; and planning for migration of government and critical infrastructure systems to post-quantum cryptography is at an early stage.
The enabling environment has been strengthened decisively by the National Quantum Mission, which identifies quantum communication as one of its core verticals alongside computing, sensing and materials, and supports thematic hubs at leading institutions. DRDO, ISRO and C-DOT have each pursued quantum communication research relevant to defence, space and telecom use, while the Department of Science and Technology and the Department of Telecommunications support research and standardisation. CERT-In and NCIIPC are relevant to the adoption of quantum-safe security in critical information infrastructure, and Startup India and the deep-tech innovation ecosystem provide pathways for new enterprises. What remains missing is a resilience-oriented roadmap that connects research, component manufacturing, network deployment and post-quantum migration for national critical systems; and this is the gap that BAP-I seeks to address through this tab.
Importance of the Sector
Economy
Quantum communication is an early-stage but strategically significant industry. Its immediate economic value lies in protecting the high-value transactions and data of banking, financial market infrastructure, defence, government and critical utilities, where the cost of compromise is very large. In the longer term, a domestic base in photonics, detectors, lasers and quantum devices would create a high-technology manufacturing segment with spillovers into sensing, medical imaging, telecommunications and space. Early national capability also positions Bharat to participate in global standard setting and to supply trusted quantum-secure systems to partner countries.
Employment
The sector requires a specialised workforce that is still small in number: quantum physicists, photonics and optical engineers, electronics and FPGA designers, cryptographers, network engineers, and technicians skilled in precision optics, cryogenics and clean assembly. Deployment of quantum networks will also require telecom engineers trained in quantum-aware network operations and key management, and post-quantum migration will demand large numbers of software engineers and security professionals across government and industry. Building this talent pipeline, through postgraduate programmes, specialised training and industry placements, is one of the most important determinants of national readiness.
Entrepreneurship
Quantum communication offers room for deep-tech start-ups in components and subsystems, including single-photon sources and detectors, integrated photonic chips, quantum random number generators, QKD systems for specific use cases, key management software and post-quantum cryptography migration services. The path from laboratory to product is long and capital-intensive, and therefore depends on patient funding, shared fabrication and testing facilities, and early procurement by government and strategic users. It is argued that a small number of capable domestic quantum enterprises, supported through their early years, can anchor a much larger ecosystem; provided that procurement policy gives indigenous systems the opportunity to be proven in real networks.
Partnership
No institution can build national quantum communication capability alone. The sector calls for partnership between research hubs and industry for technology transfer, between telecom operators and research institutions for field trials on operational fibre, between space agencies and defence users for satellite-based links, and between standards bodies and regulators for certification. International cooperation with trusted partners on research, standards and testing can accelerate progress, provided that core components and know-how are developed domestically. BAP-I positions itself as the convening platform where these stakeholders can pursue shared research on quantum-secure resilience.
Research Focus Possibilities
BAP-I invites original research articles, policy papers, technical reports, diagnostic assessments, case studies and white papers across the following indicative research streams. The list is open-ended; contributions that connect a new question to the resilience objective of this tab are equally welcome.
A. Component Sovereignty and Technology Readiness
- Mapping indigenous capability in single-photon detectors, lasers, integrated photonics and cryogenic systems, and the export control exposure of each
- Technology readiness assessment of Bharat's fibre, free-space and satellite QKD demonstrations, and the pathway to operational deployment
- Quantum random number generation for national security applications and its validation
B. Network Architecture and Critical Infrastructure
- Design of quantum-secure backbone links for government, defence, financial market infrastructure and grid control
- Trusted-node security, quantum repeaters and the distance and cost limits of terrestrial quantum networks
- Integration of quantum key distribution with existing telecom fibre and network management systems
- Role of satellite-based quantum links for national coverage, strategic islands and remote installations
C. Post-Quantum Transition, Standards and Assurance
- National roadmap for migrating government and critical systems to post-quantum cryptography, including inventory of vulnerable systems
- Testing, certification and side-channel assessment of quantum communication equipment
- Bharat's participation in international standards for QKD and post-quantum algorithms
D. Innovation, Enterprise and Human Capital
- Funding, procurement and incubation models for quantum communication start-ups
- Talent gap analysis in quantum optics, photonics and quantum-safe cryptography, with recommendations for curricula
- Technology transfer from National Quantum Mission hubs and national laboratories to industry
- Opportunities and risks in international quantum research collaboration
Who Can Participate
This tab invites participation from National Quantum Mission hubs, IITs, IISc, IISERs, the Raman Research Institute and other research institutions in quantum science, DRDO, ISRO and C-DOT, the Department of Telecommunications and standards bodies, telecom operators and network equipment makers, banks and financial market infrastructure operators, CERT-In, NCIIPC and security agencies, photonics and electronics manufacturers, quantum start-ups, policy think tanks, international collaborators and individual researchers with domain expertise. Contributions from engineers building and testing real systems carry the same standing as those from policymakers and academics within the BAP-I research framework.
The Resilience Objective
Every contribution under this tab must serve one purpose: ensuring that Bharat's most sensitive communications remain secure, under sovereign control, in an age when quantum technology changes the rules of encryption. BAP-I treats quantum-secure communication as an emerging pillar of national resilience; and research under this tab is the instrument through which the transition is planned, the dependencies are identified and the capability is built.
