A New Approach to Practical Active-Secure Two-Party Computation
Abstract
We propose a new approach to practical two-party computation secure against an active adversary. All prior practical protocols were based on Yao's garbled circuits. We use an OT-based approach and get efficiency via OT extension in the random oracle model. To get a practical protocol we introduce a number of novel techniques for relating the outputs and inputs of OTs in a larger construction. We also report on an implementation of this approach, that shows that our protocol is more efficient than any previous one: For big enough circuits, we can evaluate more than 20000 Boolean gates per second. As an example, evaluating one oblivious AES encryption (~34000 gates) takes 64 seconds, but when repeating the task 27 times it only takes less than 3 seconds per instance.
Cite
@article{arxiv.1202.3052,
title = {A New Approach to Practical Active-Secure Two-Party Computation},
author = {Jesper Buus Nielsen and Peter Sebastian Nordholt and Claudio Orlandi and Sai Sheshank Burra},
journal= {arXiv preprint arXiv:1202.3052},
year = {2012}
}