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A Practical Full Key Recovery Attack On TFHE And FHEW By Inducing Decryption Errors.pdf

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Preview of A Practical Full Key Recovery Attack on TFHE and FHEW by Inducing Decryption Errors
🔗 Source: eprint.iacr.org
📊 Size: 836 KB
📄 Pages: 18 pages
⬇️ Downloads: 88

Summary

Researchers from the Indian Institute of Technology, Kharagpur, have demonstrated a practical full key recovery attack on two fully homomorphic encryption (FHE) libraries, FHEW and TFHE, by inducing decryption errors. The attack exploits the client's reaction to erroneous results, allowing the server to extract the secret key in a few attempts, breaking the IND-CVA security of the FHE schemes. The attack requires 8 and 23 queries to the client for each error recovery for FHEW and TFHE, respectively, and has been successfully demonstrated on TFHE with key sizes of 630 bits, recovering the correct errors with 19838 and 29200 client queries, and on FHEW with key size 500, recovering correct errors with 7565 client queries.

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Description

Researchers from the Indian Institute of Technology, Kharagpur, have demonstrated a practical full key recovery attack on two fully homomorphic encryption...

Technical Information

  • File Format: PDF
  • File Size: 836 KB
  • Pages: 18
  • Language: EN
  • Total Downloads: 88
  • Last Updated: 4 hours ago

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Practical guidePractical tutorialFull guideFull tutorialRecovery guideRecovery tutorialAttack guideAttack tutorialTFHE guideTFHE tutorialFHEW guideFHEW tutorialInducing guideInducing tutorialDecryption guideDecryption tutorialErrors guideErrors tutorial

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