Bootstrapping obfuscators via fast pseudorandom functions

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We show that it is possible to upgrade an obfuscator for a weak complexity class WEAK into an obfuscator for arbitrary polynomial size circuits, assuming that the class WEAK can compute pseudorandom functions. Specifically, under standard intractability assumptions (e.g., hardness of factoring, Decisional Diffie-Hellman, or Learning with Errors), the existence of obfuscators for NC1 or even TC0 implies the existence of general-purpose obfuscators for P. Previously, such a bootstrapping procedure was known to exist under the assumption that there exists a fully-homomorphic encryption whose decryption algorithm can be computed in WEAK. Our reduction works with respect to virtual black-box obfuscators and relativizes to ideal models.

Original languageEnglish
Title of host publicationAdvances in Cryptology - ASIACRYPT 2014 - 20th International Conference on the Theory and Application of Cryptology and Information Security, Proceedings, Part II
EditorsPalash Sarkar, Tetsu Iwata
PublisherSpringer Verlag
Pages162-172
Number of pages11
ISBN (Electronic)9783662456071
DOIs
StatePublished - 2014
Event20th International Conference on the Theory and Application of Cryptology and Information Security, ASIACRYPT 2014 - Kaoshiung, Taiwan, Province of China
Duration: 7 Dec 201411 Dec 2014

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume8874

Conference

Conference20th International Conference on the Theory and Application of Cryptology and Information Security, ASIACRYPT 2014
Country/TerritoryTaiwan, Province of China
CityKaoshiung
Period7/12/1411/12/14

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • General Computer Science

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