SANSCrypt: A Sporadic-Authentication-Based Sequential Logic Encryption Scheme
Abstract
We propose SANSCrypt, a novel sequential logic encryption scheme to protect integrated circuits against reverse engineering. Previous sequential encryption methods focus on modifying the circuit state machine such that the correct functionality can be accessed by applying the correct key sequence only once. Considering the risk associated with one-time authentication, SANSCrypt adopts a new temporal dimension to logic encryption, by requiring the user to sporadically perform multiple authentications according to a protocol based on pseudo-random number generation. Analysis and validation results on a set of benchmark circuits show that SANSCrypt offers a substantial output corruptibility if the key sequences are applied incorrectly. Moreover, it exhibits an exponential resilience to existing attacks, including SAT-based attacks, while maintaining a reasonably low overhead.
Cite
@article{arxiv.2010.05168,
title = {SANSCrypt: A Sporadic-Authentication-Based Sequential Logic Encryption Scheme},
author = {Yinghua Hu and Kaixin Yang and Shahin Nazarian and Pierluigi Nuzzo},
journal= {arXiv preprint arXiv:2010.05168},
year = {2021}
}
Comments
This paper has been accepted at the 28th IFIP/IEEE International Conference on Very Large Scale Integration (VLSI-SoC)