In comparison to the conventional form of administration, nowadays the E-Governance have become the smart way of deployment of administration by the authority under its jurisdiction. Since this technique requires the transmission of sensitive information between the Government and the Citizen through the Internet, information scientists take pain to provide utmost information security, which can also be further qualitatively enhanced by the incorporation of object oriented software engineering paradigm. Hence, the authors have proposed a multifaceted smart card based secured E-Governance mechanism using Multipurpose Electronic Card (MEC). In this proposed model the authentication of Citizen is achieved by the tactful implementation of digital signatures, which is the key field of digital certificate. Security of digital signature is further improved by wrapping Elliptic Curve Digital Signature Algorithm (ECDSA) in different Object Oriented Analysis Design (OOAD) tools of Unified Modeling Language (UML).