A Novel and Systematic Approach to Implement Reversible Gates in Quantum Dot Cellular Automata

Quantum dot cellular automata (QCA) is one of the emerging technologies in the area of nanoelectronics and is found to be an attractive alternative to conventional CMOS technology for several reasons. However, there have been no reports in the literature so far on QCA implementation of conventional reversible gates. In this work, we propose a novel and systematic approach for the QCA implementation of conventional reversible gates. The proposed method utilizes universal nature of the majority gate for its operation. The combination of reversible logic synthesis and its QCA implementation proves to be a superior solution for side channel attack based on power analysis in security applications. This is mainly due to the negligible amount of power consumption in both reversible logic and QCA implementation. Hence in this work, a dualfield adder, which plays a vital role in unified architectures of public-key crypto system, has been synthesized in reversible logic and implemented in QCA. Key-Words: Quantum dot cellular automata, Reversible logic, Side channel attack, Nano-technology, Cryptography, Reversible gates.