Design of Reversible Fingerprint Authenticator Circuit using Quantum-Dot Cellular Automata (QCA)

Quantum-dot cellular automata (QCA) is a the latest nano-technological development that can be used to overcome the shortcomings of traditional system. Nano-scale circuit for logic device is possible with QCA. Fingerprint is a useful signature to perform user authentication. Fingerprint is recognized with the help of biometric. So, biometric is the integral part for user authentication. A reversible design for fingerprint authenticator circuit has been proposed in this paper. As a platform to implement the authenticator circuit, QCA is used. The circuit designed is a new QCA Feynman gate. The proposed Feynman gate has lower design complexity, i.e., area, cell count and latency over existing QCA Feynman gates. The theoretical values are identical with the simulation results which claim the design accuracy. Power dissipation by the layouts describes that QCA would be an appropriate device to implement reversible circuits. In addition to this validation of authenticated user through proposed authenticator is also performed.