Blockchain-based data security encryption method and system

By adapting cross-chain grid parameters and switching between analog and digital data, the privacy and noise accumulation issues in cross-chain data transmission are resolved, enabling seamless interoperability between heterogeneous blockchains and reliable transmission of high-value data, thus ensuring data integrity and privacy protection.

CN122119902APending Publication Date: 2026-05-29FOSHAN GUOXIN TECHNOLOGY IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FOSHAN GUOXIN TECHNOLOGY IND CO LTD
Filing Date
2026-03-31
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing cross-chain data transmission schemes, the centralized decryption and re-encryption mode undermines end-to-end privacy, and the data interaction barriers and noise accumulation problems caused by the differences in the underlying mathematical structure between heterogeneous blockchains cannot meet the requirements for highly reliable cross-chain interaction.

Method used

By analyzing the security level compatibility between the source chain lattice parameters and the target chain lattice parameters, a cross-chain conversion strategy is generated. Homomorphic key switching operations are used to map the ciphertext from the source chain dimension to the target chain dimension. Combined with modulus-to-digital switching operations, noise components are compressed to generate zero-knowledge correctness proofs. After decryption on the target chain, the integrity of the source chain digital signature is verified.

Benefits of technology

It achieves seamless interoperability between blockchain systems with different security levels and computing capabilities, improves the compatibility and scalability of cross-chain networks, ensures the availability and robustness of high-value data in long-chain transmission, and ensures the integrity and authenticity of data sources, thus realizing cross-chain data privacy protection and trusted ownership confirmation.

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Abstract

The application relates to the technical field of blockchain security and discloses a data security encryption method and system based on a blockchain. The method comprises the following steps: obtaining to-be-transmitted plaintext data of a source chain and performing digital signature to obtain initial lattice basis ciphertext; obtaining target lattice parameters of a target chain, performing security level adaptation analysis on the source chain lattice parameters and the target lattice parameters, and obtaining a cross-chain conversion strategy; performing homomorphic key switching operation on the initial lattice basis ciphertext by using a cross-chain conversion key according to the cross-chain conversion strategy, performing modulus switching operation based on target modulus, and obtaining target compatible ciphertext; generating zero-knowledge correctness proof based on a conversion path, encapsulating the zero-knowledge correctness proof and the target compatible ciphertext, and obtaining cross-chain transmission data packets; and performing decryption and integrity check after the zero-knowledge correctness proof is verified to be correct on the target chain, and obtaining cross-chain interaction confirmation results. The method can realize low-noise cross-chain secure data transmission resisting quantum privacy.
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