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New Veilmind-4B framework optimizes LLM privacy without sacrificing utility

Researchers have introduced a new approach to balancing privacy and performance in Large Language Models (LLMs). Traditional methods often use static rules to remove sensitive data, which significantly degrades the model's ability to provide useful answers. The new study identifies three key mechanisms governing this trade-off: context-dependent utility, strategic adaptation, and combinatorial…

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Key points

  • Study identifies three mechanisms: context-dependent utility, strategic adaptation, and combinatorial interplay.
  • New framework uses Veilmind-4B to drive a dynamic extraction-sanitization-restoration pipeline.
  • Approach achieves low data leakage while preserving higher utility than static privacy baselines.

To address these challenges, the team developed an intent-driven local protection framework. This system utilizes a lightweight model called Veilmind-4B to drive a dynamic pipeline that extracts, sanitizes, and restores data as needed. By moving away from one-size-fits-all static rules, the framework allows for more nuanced handling of sensitive information. The result is a solution that achieves a low-leakage privacy point while maintaining substantially higher response utility compared to existing privacy-oriented baselines.

This work represents a step toward the Pareto frontier in AI privacy, demonstrating that it is possible to protect user data without severely compromising the functional quality of LLM interactions. The findings suggest that future privacy-preserving AI systems should be dynamic and intent-aware rather than relying on rigid, context-agnostic filters.

Read the original at arXiv cs.AI · by Zhenhua Liu, Zhanxu Xie, Junjie Yu, Tong Zhu, Lijun Li, Wenliang Chen primary source Open source ↗
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Veilmind-4B

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