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Analyzing Privacy Impact of Non-Private Pre-Processing in Machine Learning


Основные понятия
Evaluation of privacy impact from non-private pre-processing in machine learning pipelines.
Аннотация

The content discusses the overlooked privacy cost of data-dependent pre-processing in differentially private machine learning pipelines. It introduces a framework using Smooth DP and sensitivity analysis for pre-processing algorithms. The impact of common pre-processing techniques like deduplication, quantization, data imputation, and PCA on overall privacy guarantees is evaluated. The article also explores the necessity of conducting privacy analysis across the entire ML pipeline and proposes a PTR-inspired framework for unconditional privacy guarantees.

Abstract:

  • Proposes a framework to evaluate additional privacy cost from non-private data-dependent pre-processing.
  • Introduces technical notions: Smooth DP and sensitivity analysis for pre-processing algorithms.
  • Evaluates impact of common pre-processing techniques on overall privacy guarantees.

Introduction:

  • Discusses growing emphasis on user data privacy with Differential Privacy (DP).
  • Highlights standard practices like data imputation, deduplication, and dimensionality reduction in ML.
  • Explores challenges to privacy guarantee due to dependencies introduced by pre-processing.

Data Extraction:

  1. "A straightforward method to derive privacy guarantees for this pipeline is to use group privacy where the size of the group can be as large as the size of the dataset."
  2. "In contrast, Table 2 demonstrates that the RDP parameter ε of most private mechanisms increases to O(τε) for SRDP."

Quotations:

  • "Our work shows that the overall privacy cost of pre-processed DP pipeline can be bounded with minimal degradation in privacy guarantee."
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Статистика
A straightforward method to derive privacy guarantees for this pipeline is to use group privacy where the size of the group can be as large as the size of the dataset. In contrast, Table 2 demonstrates that the RDP parameter ε of most private mechanisms increases to O(τε) for SRDP.
Цитаты
"Our work shows that the overall privacy cost of pre-processed DP pipeline can be bounded with minimal degradation in privacy guarantee."

Ключевые выводы из

by Yaxi... в arxiv.org 03-21-2024

https://arxiv.org/pdf/2403.13041.pdf
Provable Privacy with Non-Private Pre-Processing

Дополнительные вопросы

What are some potential drawbacks or limitations when applying non-private pre-processing methods

One potential drawback of using non-private pre-processing methods is the risk of compromising user privacy. Since these methods do not incorporate privacy-preserving techniques, they may inadvertently leak sensitive information from the data. This can lead to privacy breaches and violations, especially when dealing with personal or confidential data. Additionally, non-private pre-processing methods may not adhere to regulatory requirements such as GDPR or HIPAA, exposing organizations to legal liabilities and fines. Another limitation is the lack of control over how the data is handled during pre-processing. Without privacy safeguards in place, there is a higher chance of unauthorized access or misuse of the processed data. This can result in security vulnerabilities and ethical concerns regarding data handling practices. Furthermore, non-private pre-processing methods may not provide adequate protection against adversarial attacks or inference techniques that exploit patterns in the processed data to extract sensitive information. As a result, organizations need to carefully consider the trade-offs between utility and privacy when choosing pre-processing algorithms for their ML pipelines.

How do dependencies introduced by pre-processing algorithms affect overall model performance

Dependencies introduced by pre-processing algorithms can significantly impact overall model performance in several ways: Privacy Guarantee Degradation: Data dependencies violate assumptions required for differential privacy (DP), leading to weaker guarantees when applying DP mechanisms after non-private preprocessing steps. The interdependence among data points compromises individual input independence crucial for maintaining privacy assurances. Bias Amplification: Preprocessing algorithms like deduplication or imputation can introduce biases based on existing patterns in the dataset's structure. These biases might be amplified during subsequent modeling stages, affecting model fairness and accuracy. Model Generalization: Dependencies created by preprocessing could affect how well models generalize to unseen data by introducing spurious correlations or noise into feature representations derived from dependent inputs. Data Integrity Issues: Inaccuracies introduced during preprocessing due to dependencies could propagate through subsequent analysis stages, impacting decision-making processes based on flawed insights derived from compromised datasets.

How can organizations ensure robustness and accuracy while maintaining user data privacy throughout ML pipelines

Organizations can ensure robustness and accuracy while maintaining user data privacy throughout ML pipelines by implementing several key strategies: 1- Use Privacy-Preserving Techniques: Employ differential privacy mechanisms at each stage of the pipeline where sensitive information is involved to protect individual user inputs while still allowing meaningful analysis at scale. 2- Implement Secure Data Handling Practices: Ensure encryption protocols are used for storing and transferring sensitive information securely within the organization's infrastructure. 3- Regular Audits and Compliance Checks: Conduct periodic audits to assess compliance with relevant regulations such as GDPR or CCPA ensuring that all processes align with legal requirements concerning user data protection. 4- Employee Training on Data Privacy: Educate staff members about best practices for handling confidential information responsibly and ethically throughout all phases of ML pipeline development. 5- Robust Model Validation Procedures: Implement rigorous testing procedures including cross-validation techniques that account for potential biases introduced by preprocessing steps ensuring accurate model performance across diverse datasets. 6-Continuous Monitoring: Establish monitoring systems that track any deviations from expected behavior indicating potential security breaches or unauthorized access attempts within ML pipelines. These measures collectively contribute towards building a secure environment where both robustness in model performance and stringent adherence to user-data confidentiality are maintained throughout ML operations."
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