Omer Paneth: On Obfuscation with Random Oracles

Friday, April 10, 2015 - 10:30am to 12:00pm
G575 *** Special Location***
Omer Paneth
Assuming trapdoor permutations, we show that there exist function families that cannot be VBB-obfuscated even if both the obfuscator and the obfuscated program have access to a random oracle. Specifically, these families are the robust unobfuscatable families of [Bitansky-Paneth, STOC 13].
Our result stands in contrast to the general VBB obfuscation algorithms in more structured idealized models where the oracle preserves certain algebraic homomorphisms [Canetti-Vaikuntanathan, ePrint 13; Brakerski-Rothblum, TCC 14; Barak et al., Eurocrypt 14].
Joint work with Ran Canetti and Yael Kalai.