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The recent growth in the use of Large Language Models has made them vulnerable to sophisticated adversarial assaults, manipulative prompts, and encoded malicious inputs. Existing countermeasures frequently necessitate retraining models,…

Computation and Language · Computer Science 2026-03-10 Sheikh Samit Muhaimin , Spyridon Mastorakis

High-quality prompts are crucial for eliciting outstanding performance from large language models (LLMs) on complex tasks. Existing research has explored model-driven strategies for prompt optimization. However, these methods often suffer…

Computation and Language · Computer Science 2025-06-04 Yifan Duan , Yihong Tang , Kehai Chen , Liqiang Nie , Min Zhang

Large Language Models (LLMs) have gained widespread use in various applications due to their powerful capability to generate human-like text. However, prompt injection attacks, which involve overwriting a model's original instructions with…

Cryptography and Security · Computer Science 2025-04-07 Jiahao Yu , Yangguang Shao , Hanwen Miao , Junzheng Shi

Large language models (LLMs) have demonstrated impressive performance on many tasks. However, to achieve optimal performance, specially designed prompting methods are still needed. These methods either rely on task-specific few-shot…

Computation and Language · Computer Science 2024-02-29 Haoxiang Guan , Jiyan He , Shuxin Zheng , En-Hong Chen , Weiming Zhang , Nenghai Yu

Large language models (LLMs) have achieved huge success in numerous natural language process (NLP) tasks. However, it faces the challenge of significant resource consumption during inference. In this paper, we aim to improve the inference…

Computation and Language · Computer Science 2024-02-05 Hanlin Zhu , Banghua Zhu , Jiantao Jiao

With the development of technology, large language models (LLMs) have dominated the downstream natural language processing (NLP) tasks. However, because of the LLMs' instruction-following abilities and inability to distinguish the…

Cryptography and Security · Computer Science 2025-10-07 Yulin Chen , Haoran Li , Yuan Sui , Yangqiu Song , Bryan Hooi

With the advancement of technology, large language models (LLMs) have achieved remarkable performance across various natural language processing (NLP) tasks, powering LLM-integrated applications like Microsoft Copilot. However, as LLMs…

Cryptography and Security · Computer Science 2025-08-05 Yulin Chen , Haoran Li , Zihao Zheng , Yangqiu Song , Dekai Wu , Bryan Hooi

Since the advent of large language models (LLMs), prompt engineering has been a crucial step for eliciting desired responses for various Natural Language Processing (NLP) tasks. However, prompt engineering remains an impediment for end…

Large Language Models (LLMs) are vulnerable to attacks like prompt injection, backdoor attacks, and adversarial attacks, which manipulate prompts or models to generate harmful outputs. In this paper, departing from traditional deep learning…

Computation and Language · Computer Science 2025-02-19 Huawei Lin , Yingjie Lao , Tong Geng , Tan Yu , Weijie Zhao

The growth of agentic AI has drawn significant attention to function calling Large Language Models (LLMs), which are designed to extend the capabilities of AI-powered system by invoking external functions. Injection and jailbreaking attacks…

Cryptography and Security · Computer Science 2026-04-24 Yannis Belkhiter , Giulio Zizzo , Sergio Maffeis , Seshu Tirupathi , John D. Kelleher

Ensuring the safety and alignment of large language models (LLMs) with human values is crucial for generating responses that are beneficial to humanity. While LLMs have the capability to identify and avoid harmful queries, they remain…

Computation and Language · Computer Science 2024-10-22 Yihua Zhou , Xiaochuan Shi

We introduce a novel framework that transforms the resource-intensive (adversarial) prompt optimization problem into an \emph{efficient, amortized inference task}. Our core insight is that pretrained, non-autoregressive generative LLMs,…

Machine Learning · Computer Science 2025-11-04 David Lüdke , Tom Wollschläger , Paul Ungermann , Stephan Günnemann , Leo Schwinn

Large language models (LLMs) increasingly rely on retrieving information from external corpora. This creates a new attack surface: indirect prompt injection (IPI), where hidden instructions are planted in the corpora and hijack model…

Cryptography and Security · Computer Science 2026-01-13 Hongyan Chang , Ergute Bao , Xinjian Luo , Ting Yu

Well-designed prompts are crucial for enhancing Large language models' (LLMs) reasoning capabilities while aligning their outputs with task requirements across diverse domains. However, manually designed prompts require expertise and…

Computation and Language · Computer Science 2025-08-22 Jinyu Xiang , Jiayi Zhang , Zhaoyang Yu , Xinbing Liang , Fengwei Teng , Jinhao Tu , Fashen Ren , Xiangru Tang , Sirui Hong , Chenglin Wu , Yuyu Luo

Given a task in the form of a basic description and its training examples, prompt optimization is the problem of synthesizing the given information into a text prompt for a large language model. Humans solve this problem by also considering…

Artificial Intelligence · Computer Science 2025-05-20 Gurusha Juneja , Gautam Jajoo , Nagarajan Natarajan , Hua Li , Jian Jiao , Amit Sharma

Large Reasoning Models (LRMs) improve task performance through extended inference-time reasoning. Although previous studies suggest that longer reasoning should lead to more robust safety behavior, we find evidence to the contrary:…

Artificial Intelligence · Computer Science 2026-05-26 Jianli Zhao , Tingchen Fu , Rylan Schaeffer , Mrinank Sharma , Fazl Barez

Recent advances in prompt optimization have notably enhanced the performance of pre-trained language models (PLMs) on downstream tasks. However, the potential of optimized prompts on domain generalization has been under-explored. To explore…

Computation and Language · Computer Science 2024-10-22 Chengzhengxu Li , Xiaoming Liu , Zhaohan Zhang , Yichen Wang , Chen Liu , Yu Lan , Chao Shen

Navigation agents powered by large language models (LLMs) convert natural language instructions into executable plans and actions. Compared to text-based applications, their security is far more critical: a successful prompt injection…

Cryptography and Security · Computer Science 2026-01-21 Jiani Liu , Yixin He , Lanlan Fan , Qidi Zhong , Yushi Cheng , Meng Zhang , Yanjiao Chen , Wenyuan Xu

Answering multi-hop reasoning questions requires retrieving and synthesizing information from diverse sources. Large Language Models (LLMs) struggle to perform such reasoning consistently. Here we propose an approach to pinpoint and rectify…

Computation and Language · Computer Science 2024-03-01 Mansi Sakarvadia , Aswathy Ajith , Arham Khan , Daniel Grzenda , Nathaniel Hudson , André Bauer , Kyle Chard , Ian Foster

Large Language Models (LLMs), renowned for their superior proficiency in language comprehension and generation, stimulate a vibrant ecosystem of applications around them. However, their extensive assimilation into various services…

Cryptography and Security · Computer Science 2025-12-30 Yi Liu , Gelei Deng , Yuekang Li , Kailong Wang , Zihao Wang , Xiaofeng Wang , Tianwei Zhang , Yepang Liu , Haoyu Wang , Yan Zheng , Leo Yu Zhang , Yang Liu