I. Requirements Analysis
The rapid advancement of quantum computing poses a serious threat to existing cryptographic technologies. Guided by the strategic requirements of the global energy internet, the power industry adheres to the principles of "security zoning, dedicated networks, horizontal isolation, and vertical authentication." It has issued the "Notice on Matters Decided for Research and Application of Quantum Communication Technology," committing to explore the application of quantum communication technology to achieve technological upgrades and ensure network information security.
A switch is a network device that identifies devices based on their MAC addresses and encapsulates and forwards data frames. Autonomous and controllable cybersecurity switches utilize domestically developed switch chips, CPUs, and operating system software to ensure product autonomy, controllability, and network security.
II. Working Principle
The quantum-secure switch is a redesigned version of traditional autonomous network switches, integrating quantum cryptography technology. By incorporating dedicated key interfaces and invoking quantum keys to support encryption at the OSI model's Layer 2 (Data Link Layer), it achieves unconditionally secure confidential communication. This device features high ciphertext throughput and rapid encryption/decryption capabilities, meeting the demands of high-security, high-bandwidth network system applications. It serves as a core application device within quantum cryptographic communication networks.
III. Features and Functions
1. Utilizes quantum encryption with rapid key rotation and on-demand configuration;
2. Ciphertext throughput exceeds 9000 Mbps;
3. Compatible with existing networks for easy deployment;
4. Supports commercial cryptographic algorithms and is independently controlled;
5. 48 Ethernet ports and 4 10-Gigabit fiber ports deliver robust load capacity and easy scalability.
IV. Product Specifications
| Name | Parameters | Unit |
| Number of network ports | 48 Gigabit Ethernet ports, 4 10 Gigabit Ethernet ports | 口 |
| Total Switching Capacity | 176 | Gbps |
| Whole-machine packet forwarding rate | one hundred thirty | Mpps |
| Number of encrypted channels | 4 | Chicken |
| Encryption key | Quantum key | / |
| Encryption algorithm | Small-scale, AES-128 | / |
| Key update frequency | ＞200 | T/S |
| Ciphertext throughput | ≥9000 | Mbps |
| Key Interface | Dedicated RJ45 port | / |
| Operating Temperature | 0~40 | ℃ |
| Chassis Dimensions (W × H × D) | 440 * 44.5 * 415 | mm |
| Power Supply | 100–240 V (dual power supply) | Vacant |
| Power consumption | ≤100 | In |
V. Typical Applications
1. Power Dispatch Command Security Management
① Quantum-Secure Command Channel: Establishes quantum-secure tunnels between the five-tier dispatch system (National Dispatch - Network Dispatch - Provincial Dispatch - Regional Dispatch - County Dispatch), enabling dynamic encryption with unique keys per command. This reduces the error rate from the conventional 1e-6 to 1e-18.
② Provides quantum-level protection for SCADA system "four remote" (remote measurement, remote signaling, remote control, remote adjustment) data, preventing command hijacking and data tampering;
③ Intelligent Scheduling Optimization Decisions: Quantum computing accelerates flow calculations, solving challenges in power grid planning and operational optimization with computational efficiency improvements exceeding 50 times.
2. Security Assurance for Intelligent Operation and Maintenance of Substations
① Quantum Protection for On-Site Automation Systems: Provides quantum encryption for IEC 61850 protocol communications to prevent tampering with control commands in smart substations;
② Enhanced Mobile Inspection Security: Prior to drone inspections, quantum keys are retrieved from the quantum cloud control system to ensure secure transmission of inspection data. Quantum-encrypted channels are provided for mobile devices such as quadruped robots and smart cameras, establishing an integrated air-ground security monitoring network.
3. Security Upgrade for Distribution Network Automation
① "Quantum + 5G" Distribution Network Protection: Deploy quantum CPE encryption devices for distribution terminals such as FTUs, DTUs, and TTUs. Establish secure channels via the 5G public network, reducing construction costs by 70%.
② Intelligent Distributed FA Protection: The Quantum Cloud Control System provides unified key management and device authentication for distributed FA, preventing "fake switch" attacks.
4. Grid Integration Safety and Optimization for New Energy: Secure Aggregation of Distributed Energy Resources
① Innovative two-stage quantum encryption with aggregation and access: First, dispersed renewable energy data is aggregated via wireless quantum encryption at regional control stations, then transmitted to the dispatch system through fiber-optic quantum encryption.
② Provide quantum protection for AGC/AVC commands in wind farms and photovoltaic power stations, preventing tampering with generation data and "pseudo-grid connection" attacks.
