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Evaluating the quality of machine-generated natural language content is a challenging task in Natural Language Processing (NLP). Recently, large language models (LLMs) like GPT-4 have been employed for this purpose, but they are…

Computation and Language · Computer Science 2024-12-23 Daniil Larionov , Steffen Eger

Large language models (LLMs) have achieved widespread adoption across numerous applications. However, many LLMs are vulnerable to malicious attacks even after safety alignment. These attacks typically bypass LLMs' safety guardrails by…

Cryptography and Security · Computer Science 2025-06-17 Yucheng Li , Surin Ahn , Huiqiang Jiang , Amir H. Abdi , Yuqing Yang , Lili Qiu

In this study, we propose a homotopy-inspired prompt obfuscation framework to enhance understanding of security and safety vulnerabilities in Large Language Models (LLMs). By systematically applying carefully engineered prompts, we…

Cryptography and Security · Computer Science 2026-01-22 Luis Lazo , Hamed Jelodar , Roozbeh Razavi-Far

Large Language Models (LLMs) have revolutionized numerous fields, yet their adaptation to specialized tasks in privacy-sensitive domains such as healthcare and finance remains constrained due to the scarcity of accessible training data…

Machine Learning · Computer Science 2026-03-03 Jinglong Luo , Zhuo Zhang , Yehong Zhang , Shiyu Liu , Ye Dong , Hui Wang , Yue Yu , Xun Zhou , Zenglin Xu

The large-scale adoption of Large Language Models (LLMs) forces a trade-off between operational cost (OpEx) and data privacy. Current routing frameworks reduce costs but ignore prompt sensitivity, exposing users and institutions to leakage…

Cryptography and Security · Computer Science 2026-04-01 Alessio Langiu

System prompts are critical for guiding the behavior of Large Language Models (LLMs), yet they often contain proprietary logic or sensitive information, making them a prime target for extraction attacks. Adversarial queries can successfully…

Cryptography and Security · Computer Science 2026-02-03 Huseein Jawad , Nicolas Brunel

In long context scenarios, large language models (LLMs) face three main challenges: higher computational cost, performance reduction, and position bias. Research indicates that LLM performance hinges on the density and position of key…

Computation and Language · Computer Science 2024-08-13 Huiqiang Jiang , Qianhui Wu , Xufang Luo , Dongsheng Li , Chin-Yew Lin , Yuqing Yang , Lili Qiu

Private large language model (LLM) inference based on cryptographic primitives offers a promising path towards privacy-preserving deep learning. However, existing frameworks only support dense LLMs like LLaMA-1 and struggle to scale to…

Cryptography and Security · Computer Science 2025-11-12 Yifan Zhou , Tianshi Xu , Jue Hong , Ye Wu , Meng Li

Large language models(LLMs) are currently at the forefront of the machine learning field, which show a broad application prospect but at the same time expose some risks of privacy leakage. We combined Fully Homomorphic Encryption(FHE) and…

Cryptography and Security · Computer Science 2025-01-08 Zhang Ruoyan , Zheng Zhongxiang , Bao Wankang

Large Language Models (LLMs) are being extensively used for cybersecurity purposes. One of them is the detection of vulnerable codes. For the sake of efficiency and effectiveness, compression and fine-tuning techniques are being developed,…

Cryptography and Security · Computer Science 2025-06-02 Luis Ibanez-Lissen , Lorena Gonzalez-Manzano , Jose Maria de Fuentes , Nicolas Anciaux

Prompt tuning (PT) offers a cost-effective alternative to fine-tuning large-scale pre-trained language models (PLMs), requiring only a few parameters in soft prompt tokens added before the input text. However, existing PT approaches face…

Computation and Language · Computer Science 2025-02-19 Pengxiang Lan , Haoyu Xu , Enneng Yang , Yuliang Liang , Guibing Guo , Jianzhe Zhao , Xingwei Wang

The increasing prevalence of large language models (LLMs) such as GPT-4 in various applications has led to a surge in the size of prompts required for optimal performance, leading to challenges in computational efficiency. Prompt…

Computation and Language · Computer Science 2024-12-19 Shivam Shandilya , Menglin Xia , Supriyo Ghosh , Huiqiang Jiang , Jue Zhang , Qianhui Wu , Victor Rühle

Motivated by the high costs of using black-box Large Language Models (LLMs), we introduce a novel prompt compression paradigm, under which we use smaller LLMs to compress inputs for the larger ones. We present the first comprehensive…

Computation and Language · Computer Science 2026-01-12 Ivan Zakazov , Berke Argin , Oussama Gabouj , Kamel Charaf , Alexander Sharipov , Alexi Semiz , Lorenzo Drudi , Nicolas Baldwin , Robert West

We propose the In-context Autoencoder (ICAE), leveraging the power of a large language model (LLM) to compress a long context into short compact memory slots that can be directly conditioned on by the LLM for various purposes. ICAE is first…

Computation and Language · Computer Science 2024-05-10 Tao Ge , Jing Hu , Lei Wang , Xun Wang , Si-Qing Chen , Furu Wei

Large language models (LLMs) have significantly facilitated human life, and prompt engineering has improved the efficiency of these models. However, recent years have witnessed a rise in prompt engineering-empowered attacks, leading to…

Cryptography and Security · Computer Science 2025-02-03 Haiyang Huang , Tianhui Meng , Weijia Jia

Large Language Models (LLMs) have achieved significant success in various natural language processing tasks, but how wireless communications can support LLMs has not been extensively studied. In this paper, we propose a wireless distributed…

Information Theory · Computer Science 2024-05-07 Nan Xue , Yaping Sun , Zhiyong Chen , Meixia Tao , Xiaodong Xu , Liang Qian , Shuguang Cui , Ping Zhang

Large Language Models (LLMs) have demonstrated impressive capabilities in a wide range of natural language processing tasks when leveraging in-context learning. To mitigate the additional computational and financial costs associated with…

Computation and Language · Computer Science 2024-10-22 Tsz Ting Chung , Leyang Cui , Lemao Liu , Xinting Huang , Shuming Shi , Dit-Yan Yeung

In this paper, we propose a new secure machine learning inference platform assisted by a small dedicated security processor, which will be easier to protect and deploy compared to today's TEEs integrated into high-performance processors.…

Cryptography and Security · Computer Science 2024-10-30 Pengzhi Huang , Thang Hoang , Yueying Li , Elaine Shi , G. Edward Suh

The increasing reliance on Large Language Models (LLMs) in sensitive domains like finance necessitates robust methods for privacy preservation and regulatory compliance. This paper presents an iterative meta-prompting methodology designed…

Computation and Language · Computer Science 2025-09-25 Sayash Raaj Hiraou

Soft prompts have emerged as a powerful alternative to adapters in parameter-efficient fine-tuning (PEFT), enabling large language models (LLMs) to adapt to downstream tasks without architectural changes or parameter updates. While prior…

Computation and Language · Computer Science 2026-01-14 Beso Mikaberidze , Teimuraz Saghinadze , Simon Ostermann , Philipp Muller