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Related Experiment Video

Updated: Jun 29, 2025

The Deese-Roediger-McDermott DRM Task: A Simple Cognitive Paradigm to Investigate False Memories in the Laboratory
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Deceptive Information Retrieval.

Sajani Vithana1, Sennur Ulukus1

  • 1Department of Electrical and Computer Engineering, University of Maryland, College Park, MD 20742, USA.

Entropy (Basel, Switzerland)
|March 28, 2024
PubMed
Summary

This study introduces deceptive information retrieval (DIR), a method for users to download files while misleading databases about the requested file index. The proposed scheme enables deception by strategically using real and dummy queries on time-sensitive data.

Keywords:
deceptioninformation retrievalprobabilistic schemes

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Area of Science:

  • Information Security
  • Computer Science
  • Data Privacy

Background:

  • Private Information Retrieval (PIR) allows users to download files without revealing their index.
  • Existing PIR schemes focus on privacy but not on actively deceiving the databases.
  • Deceptive Information Retrieval (DIR) extends PIR by introducing a deception metric.

Purpose of the Study:

  • To introduce and define the problem of Deceptive Information Retrieval (DIR).
  • To propose a scheme for users to retrieve files while deceiving databases about the file index.
  • To analyze the trade-off between retrieval rate and the level of deception.

Main Methods:

  • Users send real queries for immediate retrieval and dummy queries at future times.
  • The scheme manipulates database prediction probabilities using strategically timed queries.
  • The proposed DIR scheme builds upon capacity-achieving probabilistic PIR.

Main Results:

  • The proposed scheme achieves deception by making database predictions incorrect with high probability.
  • The deception metric quantifies the increase in database prediction error compared to PIR.
  • Retrieval rates are lower than PIR capacity due to additional downloads for deception.

Conclusions:

  • The proposed DIR scheme effectively enables users to deceive databases during file retrieval.
  • The scheme achieves PIR capacity when the required level of deception is zero.
  • DIR presents a novel approach to information retrieval with enhanced privacy and deception capabilities.