Functional requirements of Secure File Sharing System with non-functional

Functional Requirements for a Secure File Sharing System

1. User Authentication and Authorization:
   • User Registration: Allow users to create accounts with secure credentials.
   • Login and Authentication: Implement secure login mechanisms (e.g., username/password, two-factor authentication).
   • Role-Based Access Control: Define and enforce permissions based on user roles (e.g., administrators, users).
2. File Upload and Download:
   • File Upload: Enable users to upload files with support for various file types and sizes.
   • File Download: Allow users to download files securely.
3. File Encryption:
   • Encryption at Rest: Encrypt files stored on the server to protect data from unauthorized access.
   • Encryption in Transit: Use encryption protocols (e.g., TLS/SSL) to secure file transfers over the network.
4. Access Control:
   • File Sharing Permissions: Allow users to set permissions for file access (e.g., read, write, share).
   • Link Expiry: Provide options to set expiration dates for shared file links.
5. Audit and Logging:
   • Activity Logging: Record user activities related to file access, upload, download, and sharing.
   • Audit Trails: Generate audit trails to track file access and changes.
6. File Versioning:
   • Version Control: Maintain versions of files to track changes and revert to previous versions if needed.
   • Version History: Provide access to version history for review and recovery.
7. File Search and Retrieval:
   • Search Functionality: Enable users to search for files using keywords, tags, or metadata.
   • Advanced Filters: Implement advanced filtering options to refine search results.
8. File Management:
   • Organize Files: Allow users to organize files into folders or categories.
   • Rename and Delete: Provide options to rename or delete files and folders.
9. Notifications and Alerts:
   • Activity Notifications: Notify users about file activities such as uploads, downloads, and shared access.
   • Security Alerts: Alert users to any suspicious activities or unauthorized access attempts.
10. Integration with Other Systems:
    • Cloud Storage Integration: Integrate with cloud storage providers for seamless file management.
    • External Application Integration: Interface with external applications or services for enhanced functionality.
11. User Support and Help:
    • Help Desk: Provide support resources and a help desk for user assistance.
    • FAQs and Documentation: Offer comprehensive FAQs and user documentation.
12. Backup and Recovery:
    • Data Backup: Regularly back up files and user data to prevent loss.
    • File Recovery: Implement procedures for recovering files from backups or previous versions.

Non-Functional Requirements for a Secure File Sharing System

1. Performance:
   • Response Time: Ensure quick response times for file uploads, downloads, and access requests.
   • Scalability: Handle increasing volumes of files and users efficiently.
2. Reliability:
   • High Availability: Ensure the system is operational with minimal downtime.
   • Fault Tolerance: Implement mechanisms to handle system failures gracefully without data loss.
3. Security:
   • Data Protection: Use strong encryption and access controls to protect file data and user information.
   • Secure Communication: Ensure secure communication channels for file transfers and user interactions.
4. Usability:
   • User Interface: Design an intuitive and user-friendly interface for managing files and permissions.
   • Ease of Use: Ensure that file sharing, access control, and search functions are straightforward and accessible.
5. Maintainability:
   • Modular Design: Develop the system with modular components to facilitate maintenance and updates.
   • Documentation: Provide comprehensive documentation for system administration, configuration, and troubleshooting.
6. Interoperability:
   • System Integration: Ensure compatibility with other systems and services, such as cloud storage providers and external applications.
   • Standard Protocols: Use standard communication protocols for data exchange and integration.
7. Availability:
   • 24/7 Operation: Ensure the system is available around the clock for file access and sharing.
   • Disaster Recovery: Implement a disaster recovery plan to restore system functionality in case of major failures.
8. Compliance:
   • Regulatory Compliance: Adhere to relevant regulations and standards for data protection and file sharing (e.g., GDPR, HIPAA).
   • Data Privacy Regulations: Comply with data protection regulations to ensure the privacy of user data.
9. Accessibility:
   • Inclusive Design: Design the system to be accessible to users with disabilities, following WCAG (Web Content Accessibility Guidelines).
   • Device Compatibility: Ensure compatibility with various devices used for accessing the system, including desktops and mobile devices.
10. Localization and Internationalization:
    • Language Support: Support multiple languages for a global user base.
    • Regional Settings: Allow customization based on regional regulations and practices.
11. Data Accuracy and Integrity:
    • Error Handling: Implement mechanisms to detect and correct errors in file handling and data processing.
    • Data Validation: Ensure accurate data entry and processing through validation checks.
12. Scalability:
    • Growth Management: The system should scale to accommodate an increasing number of files, users, and data storage requirements.
    • Performance Monitoring: Continuously monitor system performance and adjust resources as needed.