all InfoSec news
Hybrid Protection of Digital FIR Filters. (arXiv:2301.11115v1 [cs.CR])
cs.CR updates on arXiv.org arxiv.org
A digital Finite Impulse Response (FIR) filter is a ubiquitous block in
digital signal processing applications and its behavior is determined by its
coefficients. To protect filter coefficients from an adversary, efficient
obfuscation techniques have been proposed, either by hiding them behind decoys
or replacing them by key bits. In this article, we initially introduce a query
attack that can discover the secret key of such obfuscated FIR filters, which
could not be broken by existing prominent attacks. Then, we …
adversary applications article attack bits block decoys digital digital signal processing discover filter hybrid key obfuscated obfuscation protect protection query response secret secret key signal techniques