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The rapid advancement of large language models (LLMs) has revolutionized natural language processing, enabling applications in diverse domains such as healthcare, finance and education. However, the growing reliance on extensive data for…

Cryptography and Security · Computer Science 2024-12-10 Guoshenghui Zhao , Eric Song

Positional bias in large language models (LLMs) hinders their ability to effectively process long inputs. A prominent example is the "lost in the middle" phenomenon, where LLMs struggle to utilize relevant information situated in the middle…

Computation and Language · Computer Science 2025-05-29 Runchu Tian , Yanghao Li , Yuepeng Fu , Siyang Deng , Qinyu Luo , Cheng Qian , Shuo Wang , Xin Cong , Zhong Zhang , Yesai Wu , Yankai Lin , Huadong Wang , Xiaojiang Liu

With the widespread application of large language models (LLMs), user privacy protection has become a significant research topic. Existing privacy preference modeling methods often rely on large-scale user data, making effective privacy…

Cryptography and Security · Computer Science 2025-05-13 Haowei Yang , Qingyi Lu , Yang Wang , Sibei Liu , Jiayun Zheng , Ao Xiang

Large Language Models (LLMs) are widely used in sensitive domains, including healthcare, finance, and legal services, raising concerns about potential private information leaks during inference. Privacy extraction attacks, such as…

Cryptography and Security · Computer Science 2025-06-25 Jinwen He , Yiyang Lu , Zijin Lin , Kai Chen , Yue Zhao

Pre-trained language models (PLMs) have demonstrated significant proficiency in solving a wide range of general natural language processing (NLP) tasks. Researchers have observed a direct correlation between the performance of these models…

Computation and Language · Computer Science 2024-04-12 Kennedy Edemacu , Xintao Wu

Large language models (LLMs) show strong reasoning abilities across diverse tasks, yet their performance on extended contexts remains inconsistent. While prior research has emphasized mid-context degradation in question answering, this…

Computation and Language · Computer Science 2026-02-25 Pietro Bernardelle , Stefano Civelli , Kevin Roitero , Gianluca Demartini

Large language models (LLMs) are rapidly being adopted for tasks like drafting emails, summarizing meetings, and answering health questions. In these settings, users may need to share private information (e.g., contact details, health…

Computation and Language · Computer Science 2026-01-16 Xiaoyuan Wu , Roshni Kaushik , Wenkai Li , Lujo Bauer , Koichi Onoue

Addressing contextual privacy concerns remains challenging in interactive settings where large language models (LLMs) process information from multiple sources (e.g., summarizing meetings with private and public information). We introduce a…

Artificial Intelligence · Computer Science 2026-02-26 Wenkai Li , Liwen Sun , Zhenxiang Guan , Xuhui Zhou , Maarten Sap

The discourse on privacy risks in Large Language Models (LLMs) has disproportionately focused on verbatim memorization of training data, while a constellation of more immediate and scalable privacy threats remain underexplored. This…

Cryptography and Security · Computer Science 2025-10-03 Niloofar Mireshghallah , Tianshi Li

Perplexity is a widely adopted metric for assessing the predictive quality of large language models (LLMs) and often serves as a reference metric for downstream evaluations. However, recent evidence shows that perplexity can be unreliable,…

Machine Learning · Computer Science 2026-02-05 Letian Cheng , Junyan Wang , Yan Gao , Elliott Wen , Ting Dang , Hong Jia

We present PersonaConvBench, a large-scale benchmark for evaluating personalized reasoning and generation in multi-turn conversations with large language models (LLMs). Unlike existing work that focuses on either personalization or…

Large language models (LLMs) often fail to scale their performance on long-context tasks performance in line with the context lengths they support. This gap is commonly attributed to retrieval failures -- the models' inability to identify…

Computation and Language · Computer Science 2025-10-08 Yufeng Du , Minyang Tian , Srikanth Ronanki , Subendhu Rongali , Sravan Bodapati , Aram Galstyan , Azton Wells , Roy Schwartz , Eliu A Huerta , Hao Peng

As large language models (LLMs) rapidly advance and integrate into daily life, the privacy risks they pose are attracting increasing attention. We focus on a specific privacy risk where LLMs may help identify the authorship of anonymous…

Computation and Language · Computer Science 2024-11-21 Zichen Wen , Dadi Guo , Huishuai Zhang

Large language models (LLMs) have demonstrated remarkable progress in understanding long-context inputs. However, benchmarks for evaluating the long-context reasoning abilities of LLMs fall behind the pace. Existing benchmarks often focus…

Computation and Language · Computer Science 2025-11-19 Zhan Ling , Kang Liu , Kai Yan , Yifan Yang , Weijian Lin , Ting-Han Fan , Lingfeng Shen , Zhengyin Du , Jiecao Chen

Large Language Models (LLMs) are increasingly serving as personal assistants, where users share complex and diverse preferences over extended interactions. However, assessing how well LLMs can follow these preferences in realistic,…

Artificial Intelligence · Computer Science 2026-03-05 Qianyun Guo , Yibo Li , Yue Liu , Bryan Hooi

SpeechLLMs are increasingly deployed in professional settings where domain customisation is standard practice: users supply context in prompts with sensitive information, fine-tune on proprietary recordings, or both. We identify and…

Computation and Language · Computer Science 2026-05-28 Maike Züfle , Jan Niehues

While integrating external tools into large language models (LLMs) enhances their ability to access real-time information and domain-specific services, existing approaches focus narrowly on functional tool selection following user…

Computation and Language · Computer Science 2025-05-23 Zihao Cheng , Hongru Wang , Zeming Liu , Yuhang Guo , Yuanfang Guo , Yunhong Wang , Haifeng Wang

Large Language Models (LLMs) have shown greatly enhanced performance in recent years, attributed to increased size and extensive training data. This advancement has led to widespread interest and adoption across industries and the public.…

Computation and Language · Computer Science 2024-06-19 Victoria Smith , Ali Shahin Shamsabadi , Carolyn Ashurst , Adrian Weller

Large Language Models (LLMs) are increasingly deployed for personalized product recommendations, with practitioners commonly assuming that longer user purchase histories lead to better predictions. We challenge this assumption through a…

Information Retrieval · Computer Science 2026-01-29 Kargi Chauhan , Mahalakshmi Venkateswarlu

Large Language Models (LLMs) struggle with long-context reasoning, not only due to the quadratic scaling of computational complexity with sequence length but also because of the scarcity and expense of annotating long-context data. There…

Computation and Language · Computer Science 2025-04-18 Linda He , Jue Wang , Maurice Weber , Shang Zhu , Ben Athiwaratkun , Ce Zhang