Investigating the effectiveness of Without Charge-Sharing Quasi-Adiabatic Logic for energy efficient and secure cryptographic implementations

Existing secure adiabatic logic designs use charge sharing inputs to deliver input independent energy dissipation and suffer from non-adiabatic losses (NAL) during the evaluation phase of the power-clock. However, using additional inputs present the overhead of generation, scheduling, and routing of the signals. Thus, we present “Without Charge-Sharing Quasi-Adiabatic Logic”, WCS-QuAL which doesn't require any charge sharing inputs and completely removes the NAL. The pre-layout and post-layout simulation results of the gates show that WCS-QuAL exhibits the lowest Normalized Energy Deviation (NED) and Normalized Standard Deviation (NSD) against all process corner variations at frequencies ranging from 1 MHz to 100 MHz. It also shows least variations in average energy dissipation at all five process corners. The simulation results show that the 8-bit Montgomery multiplier using WCS-QuAL exhibits the least value of NED and NSD at all the simulated frequencies and against power-supply scaling and dissipates the lowest energy at frequencies ranging from 20 MHz to 100 MHz.