H04L 9/003, H04L 9/0618, G06F 21/602, G06F 21/755, H03K 19/0019
Methods and systems are provided for a security adaptive (SA) voltage converter that receives input power from a power source and provides power to a cryptographic system. The SA voltage converter triggers countermeasures against leakage power analysis (LPA) attacks that slow down an operating frequency of the cryptographic circuit. When an LPA attack is detected, a discharging resistor sinks redundant current to alter the signature of load power dissipation of at the input to the SA voltage converter system. The SA voltage converter includes a converter reshuffling converter. The power dissipation induced by the discharging resistor, as measured at the input received from the power source, is scrambled by the SA voltage converter to increase noise inserted into the input power and to alter the power profile that is measured for the cryptographic circuit.
Kose, Selcuk and Yu, Weize, "Security-adaptive voltage conversion as a lightweight counter measure against LPA attacks" (2020). USF Patents. 1175.
University of South Florida