Reproduce “Encrypted Federated Search Using Homomorphic Encryption” on OpenResearch

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About this paper

Om Rathod, Aastha Baid, Aswani Kumar Cherukuri

Researchers from Vellore Institute of Technology developed a framework for encrypted federated search, allowing law enforcement agencies to query criminal databases using homomorphic encryption without exposing sensitive information. The system achieved 100% accuracy on small datasets for 'crime type' matching, demonstrating end-to-end confidentiality with an average query latency of approximately 20.5 seconds across three federated databases.

Key insights

  • Homomorphic encryption enables end-to-end confidentiality in federated search, allowing computations on sensitive encrypted data without exposure at any stage of the process.
  • A hybrid approach combining BFV and CKKS homomorphic encryption schemes effectively handles diverse data types, including both textual and vectorized numerical information, within a unified privacy-preserving framework.
  • Implementing homomorphic dot product matching provides a practical method for secure similarity-based record retrieval across distributed databases, despite introducing a computational overhead.

Summary by alphaXiv.

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