부산대학교 도서관

This paper introduces an innovative asymmetric cipher mechanism designed to simultaneously encrypt two fingerprint templates, effectively addressing the challenges associated with conventional approaches. Leveraging the Quasi-Zernike Synthesis algorithm, proposed scheme uniquely capitalizes on a hybrid transform domain, seamlessly integrating Fresnel and Gyrator transforms with a rear-mounted phase mask. The addition of a rear-mounted phase mask, along with twin decomposition techniques, enhances the uniqueness of the proposed scheme. By incorporating unequal modulus and random modulus decomposition strategically, the scheme not only increases key space for robustness but also ensures heightened security. Furthermore, the asymmetric nature of the proposed cryptosystem resolves key sharing and management issues commonly encountered in symmetric encryption. The validation process includes rigorous statistical analyses, differential analysis, attack simulations, and key sensitivity analysis, demonstrating the cryptosystem's resilience against various attacks such as brute-force, occlusion, and noise attacks, as well as special and differential attacks. Notably, the achieved entropy value of approximately 7.9955, coupled with an encryption time of less than 0.5 s, highlights the efficiency and reliability of the approach. This work significantly contributes to advancing secure data transmission, providing an impactful solution for scenarios involving substantial noise interference while mitigating key management complexities through its asymmetric design.