Federated Prompt Learning: A Unified Framework, Empirical Analysis, and Future Directions

• URL: http://arxiv.org/abs/2608.13844v1
• Date: Fri, 14 Aug 2026 00:25:24 GMT
• Title: Federated Prompt Learning: A Unified Framework, Empirical Analysis, and Future Directions
• Abstract summary: Federated prompt learning (FPL) is a decentralized training paradigm that enables clients to collaboratively train a learning model without sharing raw data.<n>This paper reviews recent advances in integrating the federated learning paradigm and large language models.
• Score: 26.241910333534875
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: Large language models (LLMs) have become core components of cloud-based intelligent services in academia and industry, yet their training and deployment are hindered by high computational costs, data centralization, and privacy concerns. Federated learning (FL) offers a decentralized training paradigm that enables clients to collaboratively train a learning model without sharing raw data, making it a promising solution for privacy-preserving LLM training and reasoning. This paper presents a comprehensive survey of federated prompt learning (FPL) to review recent advances in integrating the federated learning paradigm and large language models, answering the following research questions: RQ1: The fundamental motivations, characteristics, and enabling technologies of FPL, and how it differs from conventional FL and full-model federated fine-tuning; RQ2: The trade-offs FPL approaches exhibit in performance, communication efficiency, computational overhead, scalability, personalization, and heterogeneity handling; RQ3: The remaining security, privacy, robustness, and system challenges, along with key future research directions. To this end, we systematically examine existing FPL methods across the full model lifecycle: pre-training, fine-tuning, and practical applications, while discussing security, privacy, and robustness issues and summarizing existing defense mechanisms. Finally, we highlight open challenges and future directions, aiming to help readers understand how the insights drive research in FPL.

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