Budget Recycling Differential Privacy Framework for Enhanced Utility and Privacy Protection

핵심 개념

Introducing the Budget Recycling Differential Privacy (BR-DP) framework enhances utility and privacy protection by optimizing budget allocation and incorporating subsampling.

초록

The Budget Recycling Differential Privacy (BR-DP) framework introduces a novel approach to differential privacy, focusing on enhancing utility while maintaining privacy. By combining a DP kernel with a recycler, BR-DP aims to provide soft-bounded noisy outputs within predefined error boundaries. The framework optimally allocates the total privacy budget between the DP kernel and the recycler, achieving reduced privacy leakage post-composition compared to traditional DP mechanisms. Additionally, BR-DP explores privacy amplification via subsampling to determine optimal sampling rates across various queries. Real-world experiments demonstrate the effectiveness of BR-DP in balancing utility and privacy tradeoffs.

통계

"We introduce algorithms for tight BR-DP accounting in composition scenarios."
"Our findings indicate that BR-DP achieves reduced privacy leakage post-composition compared to DP."
"By integrating BR-DP with privacy amplification via subsampling, we formulate an optimal sampling rate determination algorithm for various query types."

인용구

"We introduce the Budget Recycling Differential Privacy (BR-DP) framework, designed to provide soft-bounded noisy outputs for a broad range of existing DP mechanisms."
"BR-DP achieves lower privacy leakage than the conventional DP mechanism post-composition under the same privacy budget per query."

핵심 통찰 요약

Budget Recycling Differential Privacy

by Bo Jiang,Jia... 게시일 arxiv.org 03-19-2024

https://arxiv.org/pdf/2403.11445.pdf

더 깊은 질문

How does the Budget Recycling Differential Privacy framework address challenges faced by traditional DP mechanisms

The Budget Recycling Differential Privacy (BR-DP) framework addresses challenges faced by traditional Differential Privacy (DP) mechanisms in several ways. Firstly, BR-DP introduces the concept of soft-bounded noisy outputs, allowing for most results to fall within a predefined error boundary. This approach improves data utility while maintaining privacy simultaneously, which is a significant improvement over traditional DP mechanisms that often produce "out-of-bound" noisy results under tight privacy budgets. By probabilistically recycling or regenerating noisy answers that exceed acceptable error ranges, BR-DP enhances the likelihood of generating acceptable outputs within specified boundaries.
Additionally, the BR-DP framework optimally allocates the total available privacy budget between the DP kernel and the recycler based on a budgeting principle. This balanced distribution maximizes utility while ensuring compliance with differential privacy requirements. The integration of conventional DP mechanisms with a recycling phase in BR-DP allows for versatility and adaptability across various scenarios, making it suitable for diverse differential privacy applications.
Overall, by providing enhanced utility through improved acceptance rates and reduced leakage post-composition compared to traditional DP mechanisms, the Budget Recycling Differential Privacy framework effectively addresses key challenges such as balancing data utility and privacy protection in data-driven environments subject to stringent regulations like GDPR.

What are potential drawbacks or limitations of implementing subsampling in the BR-DP framework

While subsampling can amplify privacy guarantees in the context of Budget Recycling Differential Privacy (BR-DP), there are potential drawbacks or limitations associated with its implementation within this framework:

Utility Tradeoff: Subsampling may introduce errors due to information loss during sampling phases when applied in conjunction with perturbation processes involving noise injection. A higher sampling probability can enhance accuracy but requires more noise during perturbation, leading to decreased utility from increased noise levels.

Sampling Bias: Subsampling may introduce bias if not implemented carefully or if certain individuals are systematically excluded from samples due to random selection methods.

Complexity: Implementing subsampling adds complexity to data processing workflows and may require additional computational resources for managing sampled datasets alongside original ones.

Optimal Sampling Rate Determination: Finding an optimal sampling rate that balances information loss during sampling with noise introduced during perturbation can be challenging and may require iterative adjustments based on specific dataset characteristics and query types.

Despite these limitations, careful consideration of subsampling strategies tailored to specific use cases can help mitigate these drawbacks and leverage its benefits for enhancing privacy guarantees within the BR-DP framework.

How can the principles of optimal budget allocation in BR-DP be applied to different real-world scenarios beyond data aggregation

The principles of optimal budget allocation in Budget Recycling Differential Privacy (BR-DP) can be applied across various real-world scenarios beyond data aggregation where differential privacy considerations are paramount:

Healthcare Data Sharing: In healthcare settings where patient confidentiality is crucial, allocating budgets optimally between preserving individual medical records' sensitivity while enabling aggregate analysis could enhance both patient privacy protection and research insights generation.

Financial Data Analysis: In financial institutions handling sensitive customer information, optimizing budget allocation in differential private algorithms like BR-DP could strike a balance between fraud detection accuracy and individual transaction anonymity safeguards.

Smart City Initiatives: Urban planning projects leveraging IoT devices generate vast amounts of personal location data; applying optimal budgeting principles from BR-DP could ensure effective city planning insights without compromising residents' location-based privacies.

4..E-commerce Personalization: E-commerce platforms aiming at personalized recommendations need efficient user profiling while respecting consumer preferences; utilizing optimized budget allocations via BR-DP could enable targeted marketing without infringing on individual shopping habits' confidentiality.
By customizing optimal budget allocation strategies according to specific industry requirements and regulatory constraints,
the principles derived from BR-OP have broad applicability
across diverse sectors seeking robust yet flexible solutions
for balancing data utility enhancement with stringent
privacy protections."