Paper 2019/1443
CAS-Unlock: Unlocking CAS-Lock without Access to a Reverse-Engineered Netlist
Abhrajit Sengupta and Ozgur Sinanoglu
Abstract
CAS-Lock (cascaded locking) is a SAT-resilient locking technique, which can simultaneously thwart SAT and bypass attack, while maintaining non-trivial output corruptibility. Despite all of its theoretical guarantees, in this report we expose a serious flaw in its design that can be exploited to break CAS-Lock. Further, this attack neither requires access to a reverse-engineered netlist, nor it requires a working oracle with the correct key loaded onto the chip's memory. We demonstrate that we can activate any CAS-Locked IC without knowing the secret key.
Metadata
- Available format(s)
-
PDF
- Category
- Implementation
- Publication info
- Preprint.
- Keywords
- Hardware securityIP piracyLogic locking
- Contact author(s)
- as9397 @ nyu edu
- History
- 2019-12-12: received
- Short URL
- https://ia.cr/2019/1443
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2019/1443,
author = {Abhrajit Sengupta and Ozgur Sinanoglu},
title = {{CAS}-Unlock: Unlocking {CAS}-Lock without Access to a Reverse-Engineered Netlist},
howpublished = {Cryptology {ePrint} Archive, Paper 2019/1443},
year = {2019},
url = {https://eprint.iacr.org/2019/1443}
}
