Zhongfu Information applies for patents related to RAG system methods, addressing multiple issues in RAG systems and handling sensitive entities

April 2 News, the State Intellectual Property Office information shows that Zhongfu Information Co., Ltd. has applied for a patent titled “A RAG system operation method and system based on attribute-based encryption and user behavior perception.” The application publication number is CN121765065A, the application number is CN202511869489.0, the publication date is March 31, 2026, and the application date is December 11, 2025. Inventors include Sun Qiang, Wei Dongxiao, Liang Yu, Liu Changqiu, Peng Xianghai. The patent agency is Jinan Shunyuan Patent Agency Co., Ltd., with patent agent Cui Rongqi. The classification numbers are G06F16/3331, G06F21/62, G06F16/35, G06N3/042, G06F18/2433, G06F18/22, G06F16/334, G06F18/213, G06F40/295, G06F40/211, G06F40/30, G06N3/045, G06N5/04, G06N5/01.

The patent abstract states that this application discloses a method and system for operating a RAG system based on attribute-based encryption and user behavior perception, mainly involving the technical field of RAG systems, aimed at solving problems such as lack of dynamic adaptability in existing defense mechanisms, difficulty balancing privacy protection and content quality, and single-dimensional audit analysis. It includes: determining which text blocks to decrypt and the decryption strategy based on current user access policies, source credibility of text blocks, consistency, and preset sensitivity levels; inputting the decrypted text blocks and user retrieval needs into a language model to generate candidate answers; when the candidate answers contain preset sensitive entities, determining the privacy budget allocation value corresponding to the preset sensitive entity based on its preset sensitivity level; injecting noise into the preset sensitive entities using a log-odds perturbation noise injection algorithm and the privacy budget allocation value to obtain replacement tokens for sensitive entities in the candidate answers.

Zhongfu Information was established on March 12, 2002, and listed on the Shenzhen Stock Exchange on May 26, 2017. Its registered and office addresses are both located in Jinan City, Shandong Province. It is an important enterprise in China’s information security field, focusing on information security products and services, with technical advantages in areas such as cryptographic security.

Zhongfu Information’s main business includes research, development, production, sales of information security products, and information security services. Its industry classification is “Computer - Computer Equipment - Other Computer Equipment,” involving sectors such as digital economy, cryptographic security, and the “Xinchuang” concept.

In 2025, Zhongfu Information achieved operating revenue of 725 million yuan, ranking 10th among 11 companies in the industry, far below the industry leader GDT TransLink’s 12.06B yuan and second-place Daotong Technology’s 4.83B yuan, also below the industry average of 2.81B yuan and median of 1.11B yuan. Its main business revenue includes network security products at 459 million yuan (63.28%) and information security services at 161 million yuan (22.28%). In terms of net profit, it recorded -104 million yuan in 2025, ranking 9th in the industry, with a significant gap compared to the first-place GDT TransLink’s 1.11B yuan and second-place Daotong Technology’s 890 million yuan, below the industry average of 257 million yuan and median of 87.56 million yuan.

Recent patent information for Zhongfu Information is as follows:

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