China's Quantum Technology: Accelerating the Formation of a Controllable Information Security System

Quantum communication, with its natural characteristics of quantum unclonability and sensing through eavesdropping, has become the optimal solution to address future security challenges in quantum computing. In the past, quantum communication devices were bulky, costly, and difficult to deploy, which hindered their large-scale implementation; Nowadays, with the integration, miniaturization, and low cost of core components such as single photon detectors, quantum light sources, and key chips, quantum security capabilities can quickly sink to various terminals and scenarios.

1、 Core Technology Breakthrough: From "Large Device" to "Palm Tool"

Our scientific research team has gone through hundreds of iterations of optimization, breaking through key bottlenecks such as materials, structure, and packaging, and condensing complex quantum systems into compact modules, achieving three major leaps: first, significant reduction in volume: core equipment has been reduced from cabinet level to palm level, adapting to flexible deployment of mobile terminals, edge nodes, and vehicle mounted aircraft. The second is a comprehensive improvement in performance: the detection efficiency, key rate, and anti-interference ability are synchronously enhanced, and stable support for long-distance, multi node concurrent transmission is achieved. Thirdly, there has been a significant reduction in costs: domestic substitution has been promoted, and the self-sufficiency rate of key components has been greatly improved, clearing obstacles for large-scale commercial use. This marks a crucial leap in China's quantum communication from demonstration verification to practical application.

2、 Industry wide penetration: Quantum security safeguards national economy and people's livelihood

The dividends of miniaturization technology are rapidly released, and quantum secure communication has formed large-scale applications in key fields such as government affairs. Multiple regions have built quantum government dedicated networks and metropolitan area networks to support document transmission, video conferencing, and data sharing, achieving

Transmission without leakage and traceable access. Financial sector. Quantum encryption covers bank clearing, securities trading, and fund transfer, providing physical level security barriers for high-frequency trading and large-scale fund circulation. In the field of electricity. Serve power grid dispatch, substation control, intelligent inspection, and ensure the stable and reliable operation of energy lifelines in digital and networked environments. At the same time, quantum security also extends to industrial control, rail transit, medical and health, forming a multi scenario, widely covered, and highly reliable security application ecosystem.

3、 Autonomous and controllable: building a new generation of national information security system

With the miniaturization of core components as the fulcrum, China is accelerating the construction of a quantum security infrastructure that integrates heaven and earth and is independently controllable

Ground: Fiber optic quantum secure communication backbone network and metropolitan area network collaborate to cover, connecting urban and industry nodes.

In the air: Quantum micro nano satellites enable long-distance satellite ground key distribution, supporting cross-border and cross regional secure communication.

System: Integrating quantum key distribution (QKD) and post quantum cryptography (PQC) to form a dual protection of "physical security+algorithm security".

This system is fully autonomous from the underlying core components to networking applications, without external constraints, and can effectively resist traditional attacks and future quantum threats.