We first scrutinised the eFuses in Intel‘s 32nm high-k metal gate (HKMG) fabbed Westmere/Clarkdale processor (circa 2009). At the time, Intel was using the eFuses as part of a one-time programmable read-only memory (OTP-ROM). We now appreciate that their use can include the holding program code, on-chip configuration data and cryptographic keys. Prior to metal […]