Abstract
Secure adiabatic logics are identified as the optimal solution for cryptographic modules. We previously proposed an adiabatic logic called Current-Pass Optimized Symmetric Pass Gate Adiabatic Logic (CPO-SPGAL). The proposed CPO-SPGAL realizes a flat current waveform by considering the current path compared with conventional adiabatic logics. In this paper, to confirm more details about countermeasure against power analysis attacks, we compare S-box circuits based on the conventional and proposed adiabatic logics which are implemented using 0.18 upmu m standard CMOS. From the SPICE simulation for correlation power analysis (CPA), 409,600 power consumption traces are obtained, and the hamming distance/weight are calculated. The simulation results show that the proposed S-box is more resistant to CPA attacks than the existing adiabatic S-boxes.
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