With the advent of Web 3.0, the swift advancement of technology confronts an imminent threat from quantum computing. Security protocols safeguarding the integrity of Web 2.0 and Web 3.0 are growing more susceptible to both quantum attacks and sophisticated classical threats. The article introduces our novel long-distance free-space quantum secure direct communication (LF QSDC) as a method to safeguard against security breaches in both quantum and classical contexts. Differing from techniques like quantum key distribution (QKD), LF QSDC surpasses constraints by facilitating encrypted data transmission sans key exchanges, thus diminishing the inherent weaknesses of key-based systems. The distinctiveness of this attribute, coupled with its quantum mechanics base, protects against quantum computer assaults and advanced non-quantum dangers, harmonizing seamlessly with the untrustworthy tenets of the Web 3.0 age. The focus of our study is the technical design and incorporation of LF QSDC into web 3.0 network infrastructures, highlighting its efficacy for extended-range communication. LF QSDC is based on the memory DL04 protocol and enhanced with our novel Quantum-Aware Low-Density Parity Check (LDPC), Pointing, Acquisition, and Tracking (PAT) technologies, and Atmospheric Quantum Correction Algorithm (AQCA). Utilizing this method not only bolsters the security of worldwide Web 3.0 networks but also guarantees their endurance in a time when quantum and sophisticated classical threats exist simultaneously. Consequently, LF QSDC stands out as a robust security solution, well-suited for Web 3.0 systems amidst the constantly evolving digital environment.

翻译：随着Web 3.0时代的到来，技术的快速发展正面临着量子计算的迫在眉睫的威胁。保护Web 2.0和Web 3.0完整性的安全协议在量子攻击和复杂经典威胁面前日益脆弱。本文提出了一种新型长距离自由空间量子安全直接通信（LF QSDC）方法，用于抵御量子与经典环境下的安全漏洞。与量子密钥分发（QKD）等技术不同，LF QSDC通过无需密钥交换即可实现加密数据传输，从而突破了传统约束，减少了基于密钥系统的固有弱点。这一独特属性结合其量子力学基础，使其能够抵御量子计算机攻击和高级非量子威胁，并与Web 3.0时代不可信原则完美契合。本研究的重点是LF QSDC的技术设计及其在Web 3.0网络基础设施中的集成，重点凸显其在长距离通信中的效能。LF QSDC基于存储型DL04协议，并融合了新型量子感知低密度奇偶校验（LDPC）码、捕获、对准与跟踪（PAT）技术以及大气量子校正算法（AQCA）。采用该方法不仅能增强全球Web 3.0网络的安全性，还能确保其在量子与高级经典威胁并存的时代持续运行。因此，在持续演变的数字环境中，LF QSDC作为适用于Web 3.0系统的稳健安全解决方案脱颖而出。