I. Requirements Analysis

Traditional secure USB drives rely primarily on computational complexity to ensure information security, whereas quantum-secure USB drives derive their key generation from fundamental quantum physics principles. The quantum-secure USB drive system enables ordinary files to be stored in an unencrypted general area while allowing critical files to be encrypted using quantum keys and stored in a secure zone. It supports tailored encryption strategies for files of varying importance levels, facilitating rational data classification and secure exchange while effectively preventing data leaks.

II. Working Principle

Quantum-secure USB drives utilize quantum cryptography at their core, generating keys via quantum key sources and distributing them through secure distribution protocols. This eliminates the traditional requirement for fiber-optic channels in quantum key distribution, offering greater flexibility in key delivery. The drives incorporate embedded secure chips for key storage, preventing any unauthorized access to the keys and significantly enhancing key security.

III. Features and Functions

1. Supports quantum key sources for generating keys, ensuring true randomness;

2. Supports hierarchical management of files with varying levels of importance;

3. Supports self-destructing messages. Important files can only be opened using the built-in reader on the secure USB drive and cannot be exported.

4. Supports offline and online quantum-secure key encryption and injection;

5. Supports device fingerprint collection and dedicated device binding;

6. Supports centralized management and auditing.

IV. Typical Applications

1. Security of the Power Dispatch Command System

① Five-tier Dispatcher Identity Authentication: Provides quantum-level identity authentication for dispatchers across the National Dispatch-Network Dispatch-Provincial Dispatch-Regional Dispatch-County Dispatch systems, preventing command hijacking and data tampering.

② Dynamic encryption with one-time passwords: Quantum USB tokens generate truly random keys, using a different key for each communication session. Even if intercepted, these keys cannot be cracked, reducing the error rate from the traditional 1e-6 to 1e-18.

③ Provides quantum-level protection for SCADA system "four remote" operations (remote measurement, remote signaling, remote control, remote adjustment), preventing malicious command injection;

④ Through dual authentication via quantum USB token and password, only authorized personnel can execute critical operations. All operation records are quantum-signed throughout the process, enabling full accountability and traceability.

2. Substation Security Protection and Intelligent Operation and Maintenance

① Generate quantum session keys for IEC 61850 protocol communications to prevent tampering with control commands in smart substations;

②Leveraging the hardware encryption capabilities of quantum USB tokens, deploy "quantum security locks" for core substation equipment to prevent unauthorized access;

③ Before drone/robot inspections, obtain temporary certificates and encryption keys via the quantum USB token to ensure secure transmission of images and device data.

④ On-site maintenance personnel are equipped with quantum USB tokens to enable two-factor authentication and operation authorization prior to equipment maintenance.

3. Security Upgrade for Distribution Network Automation

① Deploy quantum CPE encryption devices for distribution terminals such as FTUs, DTUs, and TTUs to establish secure channels via the 5G public network, reducing construction costs by 70%.

② The Quantum U-Shield provides device identification and dynamic authentication for distributed FA, preventing "pseudo-switch" attacks.

4. Grid Integration Safety Assurance for New Energy Sources

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 to prevent "pseudo-grid connection" and tampering with power generation data.