Energy-Aware Design Techniques for Differenctial Power Analysis

Differential power analysis is a very effective cryptanalysis technique that extracts information on secret keys by mon-itoring instantaneous power consumption of cryptoproces-sors. To protect against differential power analysis, power supply noise is added in cryptographic computations, at the price of an increase in power consumption. We present a novel technique, based on well-known power-reducing trans-formations coupled with randomized clock gating, that in-troduces a significant amount of scrambling in the power profile without increasing (and, in some cases, by even re-ducing) circuit power consumption