A novel current measuring technique is introduced which promises to substantially enhance power analysis attacks against cryptographic co-processors. The proposed technique exploits an active circuit to measure the instantaneous current consumption of a device under attack while supplying, at the same time, the device with a stable voltage. Higher gain-bandwidth product, higher sensitivity and lower insertion error are the main advantages with respect to a resistor-based measurement. Experimental results when the proposed circuit is used to measure the current consumption of an FPGA are reported and the achievable advantage in terms of sensitivity is discussed too. ©2006 IEEE.
Enhancing Power Analysis Attacks against Cryptographic Devices / Bucci, M.; Giancane, L.; Luzzi, R.; SCOTTI, Giuseppe; TRIFILETTI, Alessandro. - (2006), pp. 2905-2908. (Intervento presentato al convegno ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems tenutosi a Kos; Greece) [10.1109/ISCAS.2006.1693232].
Enhancing Power Analysis Attacks against Cryptographic Devices
SCOTTI, Giuseppe;TRIFILETTI, Alessandro
2006
Abstract
A novel current measuring technique is introduced which promises to substantially enhance power analysis attacks against cryptographic co-processors. The proposed technique exploits an active circuit to measure the instantaneous current consumption of a device under attack while supplying, at the same time, the device with a stable voltage. Higher gain-bandwidth product, higher sensitivity and lower insertion error are the main advantages with respect to a resistor-based measurement. Experimental results when the proposed circuit is used to measure the current consumption of an FPGA are reported and the achievable advantage in terms of sensitivity is discussed too. ©2006 IEEE.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
