A dual-voltage single-rail dynamic DPA-resistant logic based on charge sharing mechanism

Differential power analysis (DPA) has become a major concern for system security. To achieve a high level of security at a low overhead of power and die area, a novel dual-voltage single-rail dynamic logic (DSDL) is proposed in this paper. DSDL reduces the power dissipation, and obtains a balanced power consumption by locking the charge in the internal nodes during evaluation, utilizing the charge sharing mechanism for voltage transfer as well as using two supply voltages and a positive feedback to speed up the evaluation process. A 4bit SBOX of AES algorithm was implemented to verify the security of the proposed logic. The simulation results proved the efficiency of DSDL, which only incurs a significantly smaller overhead in power consumption when compared with previous countermeasures.