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Graph-based Retrieval-Augmented Generation (GraphRAG) enhances the reasoning capabilities of Large Language Models (LLMs) by grounding their responses in structured knowledge graphs. Leveraging community detection and relation filtering…

Computation and Language · Computer Science 2026-04-06 Yilin Xiao , Jin Chen , Qinggang Zhang , Yujing Zhang , Chuang Zhou , Longhao Yang , Lingfei Ren , Xin Yang , Xiao Huang

The robustness of recent Large Language Models (LLMs) has become increasingly crucial as their applicability expands across various domains and real-world applications. Retrieval-Augmented Generation (RAG) is a promising solution for…

Computation and Language · Computer Science 2024-10-23 Sukmin Cho , Soyeong Jeong , Jeongyeon Seo , Taeho Hwang , Jong C. Park

In Large Language Models, Retrieval-Augmented Generation (RAG) systems can significantly enhance the performance of large language models by integrating external knowledge. However, RAG also introduces new security risks. Existing research…

Machine Learning · Computer Science 2025-06-16 Linlin Wang , Tianqing Zhu , Laiqiao Qin , Longxiang Gao , Wanlei Zhou

Retrieval-augmented generation (RAG) extends large language models (LLMs) with external knowledge, but this access path also introduces security risks that existing work often conflates with inherent LLM flaws. We frame secure RAG as…

Cryptography and Security · Computer Science 2026-05-28 Yuming Xu , Mingtao Zhang , Zhuohan Ge , Haoyang Li , Nicole Hu , Yongqi Zhang , Zhiyuan Wen , Jason Chen Zhang , Qing Li , Lei Chen

The growing adoption of Retrieval-Augmented Generation (RAG) has led to a rise in adversarial attacks. Existing defenses, relying on semantic analysis or voting, face a trade-off between high computational cost and limited robustness under…

Cryptography and Security · Computer Science 2026-05-20 Chengcai Gao , Zhihong Sun , Xiaochuan Shi , Qiufeng Wang , Chao Liang

Large language models (LLMs) have demonstrated impressive capabilities in code generation by leveraging retrieval-augmented generation (RAG) methods. However, the computational costs associated with LLM inference, particularly in terms of…

Software Engineering · Computer Science 2026-02-03 Yanlin Wang , Jiadong Wu , Tianyue Jiang , Mingwei Liu , Jiachi Chen , Chong Wang , Ensheng Shi , Xilin Liu , Yuchi Ma , Zibin Zheng

Retrieval-Augmented Generation (RAG) has become a standard approach for improving the reliability of large language models (LLMs). Prior work demonstrates the vulnerability of RAG systems by misleading them into generating attacker-chosen…

Cryptography and Security · Computer Science 2025-08-28 Yanbo Dai , Zhenlan Ji , Zongjie Li , Kuan Li , Shuai Wang

Large Language Models (LLMs) have transformed human-machine interaction since ChatGPT's 2022 debut, with Retrieval-Augmented Generation (RAG) emerging as a key framework that enhances LLM outputs by integrating external knowledge. However,…

Cryptography and Security · Computer Science 2025-07-08 Alberto Castagnaro , Umberto Salviati , Mauro Conti , Luca Pajola , Simeone Pizzi

Retrieval-augmented generation (RAG) is vulnerable to prompt injection attacks, in which an adversary inserts malicious documents containing carefully crafted injected prompts into the knowledge database. When a user issues a question…

Cryptography and Security · Computer Science 2026-05-04 Weifei Jin , Xilong Wang , Wei Zou , Jinyuan Jia , Neil Gong

This study presents Poison-RAG, a framework for adversarial data poisoning attacks targeting retrieval-augmented generation (RAG)-based recommender systems. Poison-RAG manipulates item metadata, such as tags and descriptions, to influence…

Information Retrieval · Computer Science 2025-01-22 Fatemeh Nazary , Yashar Deldjoo , Tommaso di Noia

The indexing-retrieval-generation paradigm of retrieval-augmented generation (RAG) has been highly successful in solving knowledge-intensive tasks by integrating external knowledge into large language models (LLMs). However, the…

Cryptography and Security · Computer Science 2025-02-25 Xun Liang , Simin Niu , Zhiyu Li , Sensen Zhang , Hanyu Wang , Feiyu Xiong , Jason Zhaoxin Fan , Bo Tang , Shichao Song , Mengwei Wang , Jiawei Yang

This paper concerns corpus poisoning attacks in dense information retrieval, where an adversary attempts to compromise the ranking performance of a search algorithm by injecting a small number of maliciously generated documents into the…

Information Retrieval · Computer Science 2026-03-17 Yongkang Li , Panagiotis Eustratiadis , Simon Lupart , Evangelos Kanoulas

Retrieval-Augmented Generation (RAG) offers a solution to mitigate hallucinations in Large Language Models (LLMs) by grounding their outputs to knowledge retrieved from external sources. The use of private resources and data in constructing…

Computation and Language · Computer Science 2025-02-10 Xiao Hu , Eric Liu , Weizhou Wang , Xiangyu Guo , David Lie

Retrieval-augmented generation (RAG) has become a common practice in multimodal large language models (MLLM) to enhance factual grounding and reduce hallucination. Yet, its reliance on retrieval exposes MLLMs to knowledge poisoning attacks,…

Retrieval-Augmented Generation (RAG) enriches LLMs by dynamically retrieving external knowledge, reducing hallucinations and satisfying real-time information needs. While existing research mainly targets RAG's performance and efficiency,…

Information Retrieval · Computer Science 2025-12-29 Zhuo Chen , Yuyang Gong , Jiawei Liu , Miaokun Chen , Haotan Liu , Qikai Cheng , Fan Zhang , Wei Lu , Xiaozhong Liu

Retrieval Augmented Language Models (RALMs) have gained significant attention for their ability to generate accurate answer and improve efficiency. However, RALMs are inherently vulnerable to imperfect information due to their reliance on…

Computation and Language · Computer Science 2024-10-22 Seong-Il Park , Jay-Yoon Lee

Retrieval-Augmented Generation (RAG) enables large language models (LLMs) to leverage external knowledge, but also exposes valuable RAG databases to leakage attacks. As RAG systems grow more complex and LLMs exhibit stronger…

Cryptography and Security · Computer Science 2026-05-08 Maosen Zhang , Jianshuo Dong , Boting Lu , Wenyue Li , Xiaoping Zhang , Tianwei Zhang , Han Qiu

Large language models (LLMs) have transformed natural language processing (NLP), enabling diverse applications by integrating large-scale pre-trained knowledge. However, their static knowledge limits dynamic reasoning over external…

Computation and Language · Computer Science 2025-09-26 Harshad Khadilkar , Abhay Gupta

Retrieval-Augmented Generation (RAG) significantly mitigates the hallucinations and domain knowledge deficiency in large language models by incorporating external knowledge bases. However, the multi-module architecture of RAG introduces…

Cryptography and Security · Computer Science 2026-03-24 Yanming Mu , Hao Hu , Feiyang Li , Qiao Yuan , Jiang Wu , Zichuan Liu , Pengcheng Liu , Mei Wang , Hongwei Zhou , Yuling Liu

Large Language Models (LLMs) are widely deployed in diverse real-world settings, yet remain vulnerable to jailbreaking, where prompt-based attacks bypass safety filters. We present THREAT (Targeted Harmful generation via Reframing and…

Cryptography and Security · Computer Science 2026-05-22 Shahnewaz Karim Sakib , Swati Kar , Anindya Bijoy Das