Design and Implementation of a Secure Password Management System for Multi-Platform Credential Handling

Abstract

In an era where individuals manage dozens of digital identities, secure and scalable password management has become a critical challenge. This research describes and demonstrates a command-line-based password management pro gram written in Python that was created to store users’ credentials in an encrypted format and to help with creating complex passwords for various sys tems. With the system, data access is protected based on user roles, passwords are fully encrypted, and all website, apps, and gaming credentials are easily sorted. By using object-oriented concepts and the SOLID design methods, the architecture makes programs easy to organize, maintain, and upgrade. Contrary to other tools that you have to use online and those that require a GUI, the pro posed solution is fully offline for privacy-minded users who prefer lightweight and secure solutions. New developments include dividing credentials, adding pass words with cryptographic security, and reflecting design patterns by instructions shown while designing security software. The system has been judged by usabil ity, security, and design flexibility, and it proves to be convenient for work and an informative asset in applied software engineering and cybersecurity.