Elbar, Zakaria MabkhoutKhier, YacineLoucif, Hamza: SupervisorLinda Belabdelouahab-Fernini: Supervisor2024-07-172024-07-172024https://dspace.univ-msila.dz/handle/123456789/43889In this thesis, an Account Manager software is implemented to provide internet users with a secure and independent method for managing their online account credentials. This software addresses common vulnerabilities and inconveniences found in other solutions by emphasizing data ownership and robust security mechanisms. Our objective was to enhance user security and convenience without relying on third-party services for data storage. The results demonstrate improved security and user control over their credentials. Performance tests show minimal resource usage during idle states and moderate usage under load, ensuring efficiency. Even though our work contributes to data privacy and security, some areas still require further enhancement and research.enData ownershipcredential securitydata managementThesis