Secret key exchange method and device based on module grid and storage medium

By using a modular lattice-based key exchange method to generate random number seeds and compressed public keys, and by utilizing recovery functions and signal values ​​and introducing verification tags, the problem that existing technologies cannot resist quantum computer attacks is solved. This achieves high-security and low-failure-probability key exchange, which is suitable for scenarios such as TLS/SSL handshakes, VPNs, and IoT.

CN122372191APending Publication Date: 2026-07-10XIAN JIAOTONG LIVERPOOL UNIV
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Patent Information

Application Number
CN202610446269.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-07
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing key exchange protocols and key encapsulation mechanisms cannot withstand quantum computer attacks and are difficult to replace in scenarios such as TLS/SSL handshakes, VPNs, and resource-constrained IoT, lacking forward security and single key control.

Method used

A modular lattice-based key exchange method is adopted. By generating a random number seed and a compressed public key, a recovery function is used to calculate a temporary key. Signal values ​​and verification tags are introduced to ensure data randomness and security. A hash function is used for consistency verification to reduce the probability of failure and improve security.

Benefits of technology

It significantly reduces the probability of key exchange failure, improves security, ensures data randomness and tamper resistance, and is suitable for scenarios such as TLS/SSL handshake, VPN, and IoT in quantum computing environments.

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Abstract

The invention discloses a key exchange method and device based on a module lattice and a storage medium, and the key exchange method comprises the steps: an A party generates a random number seed, obtains a compressed public key, and sends the compressed public key to a B party; the party B obtains a compressed public key by using the random number seed; recovering data from the received compressed public key of the party A and calculating a temporary key, processing the temporary key by a segmented signal function to obtain a signal value, performing coordination processing on the temporary key by using the signal value to obtain a temporary key shared by the party A and the party B, further generating a verification tag, and deriving a final key; the party A recovers the data from the received compressed public key of the party B, recalculates the verification tag and compares the verification tag with the verification tag; and only when matching succeeds, deriving a final key in the same way. The randomness of the data is ensured, and the tampering of the data received by the A party can be found, so that higher security is realized. According to the method, the failure probability is greatly reduced, and meanwhile, the safety is improved.
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