Quantum-resistant security enhancement method for secure shell protocol

WO2026037129A1PCT designated stage Publication Date: 2026-02-19CHINA TELECOM QUANTUM INFORMATION TECH GRP CO LTD
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Patent Information

Application Number
PCT/CN2025/112224
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-08-15
Filing Date
2025-08-01
Publication Date
2026-02-19

AI Technical Summary

Technical Problem

Existing classical cryptographic algorithms pose significant security risks when facing quantum computing attacks. In particular, the RSA, DSS, and Diffie-Hellman algorithms in the Secure Shell protocol cannot resist quantum computing attacks, thus threatening communication security.

Method used

By combining quantum key distribution technology and post-quantum cryptography algorithms, a hash key and an initial session key are generated by obtaining a quantum key and a key identifier, and then post-quantum cryptography is performed to generate a quantum-resistant session key, thereby enhancing the security of communication.

Benefits of technology

It improves the resistance to quantum computing attacks in communication between network devices, ensures the security and integrity of data transmission, and enhances the ability to resist quantum computing.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application discloses a quantum-resistant security enhancement method for a secure shell protocol of a communication network. The method comprises: acquiring a first quantum key and a quantum key identifier from a first network node; exchanging information with a second network device, and generating a hash key and an initial session key; performing post-quantum cryptographic encryption on the quantum key identifier on the basis of the hash key and the initial session key, and sending, to the second network device, a first encryption result obtained by the post-quantum cryptographic encryption; decrypting a received second encryption result to obtain a second decryption result; and generating a quantum-resistant session key on the basis of the initial session key, the first encryption result, the second decryption result, and the first quantum key, so as to encrypt the communication between a first network device and the second network device. The first network device and the second network device encrypt the communication by using a post-quantum cryptography algorithm and a quantum key distribution technology, thereby significantly enhancing the capability of resisting quantum computing attacks.
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Citation Information

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