Uncovering Hidden Instructions in Armv8-A Implementations
Fredrik Strupe, Rakesh Kumar · Hardware and Architectural Support for Security and Privacy · 2020
Though system and application level security has received and continue to receive significant attention, interest in hardware security has spiked only in the last few years. The majority of recently disclosed hardware security attacks exploit well known and documented hardware behaviours such as speculation, cache and memory timings, etc. We observe that security exploits in undocumented hardware behaviour can have even more severe consequences as such behaviour is rarely verified and protected against.