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3-tier applications are robust, enterprise-level programs designed to perform a series of tasks with multiple user interactions, tailored for specific purposes such as ERP, Document Management, or Bank Reconciliation Systems (BRS). These applications follow a 3-tier architecture consisting of a web-based front end (Angular), an API middleware (.NET), and a database backend (MS SQL Server).

They are built with advanced security features, including Azure ADID integration with Multi-Factor Authentication (MFA), AES-256 encryption, HTTPS protocols, and session timeouts. Security enhancements include disabling CBC mode ciphers, removing unwanted HTTP response headers, enabling X-Frame options to prevent clickjacking, Content Security Policies, and X-XSS-Protection. The responsive design ensures seamless performance across different screen sizes, offering a versatile and secure user experience.

3 Tier Solution Data Flow Diagram
  • Front-End (Angular, Gmail-like Interface):

    • The front-end is built using Angular, known for its dynamic and responsive design capabilities. The interface mimics Gmail's simplicity and user-friendly navigation, making it intuitive for users. It ensures a seamless experience, regardless of the complexity of the tasks being executed.

  • Middleware (.NET):

    • .NET serves as the middleware, bridging the front-end and the backend. It handles requests and ensures smooth communication between layers, enabling secure and efficient data handling.

  • Backend (MS SQL Server):

    • The backend database is powered by MS SQL Server, ensuring robust data storage, management, and retrieval. It supports large-scale operations with optimized performance and high reliability to processes business logic.

  • Secure Protocols:

    • Adopting the highest security standards ensures protection against vulnerabilities. Secure protocols form the backbone of safe data transmission across the application layers.

  • Azure ADID Integration with Multi-Factor Authentication (MFA):

    • Users authenticate via Azure Active Directory with MFA, adding an extra layer of security by requiring two or more verification factors. This minimizes risks of unauthorized access.

  • Session Timeout:

    • The application enforces session timeout policies to enhance security. If users remain idle for a specified period, they are logged out, preventing unauthorized access in case of unattended sessions.

  • HTTPS:

    • All data transmitted between the client and server is encrypted using HTTPS, protecting sensitive information from interception during transmission.

  • AES-256 Encryption:

    • AES-256, one of the most secure encryption standards, is implemented to safeguard stored and transmitted data against unauthorized access or breaches.

  • CBC Mode Ciphers Disabled:

    • Cipher Block Chaining (CBC) mode, vulnerable to certain cryptographic attacks, is disabled to ensure higher levels of security.

  • Unwanted HTTP Response Headers Removed:

    • Headers such as server information, ASP.NET version, and IIS version are removed from HTTP responses to minimize exposure to potential attacks.

  • X-Frame Options Header to Prevent Clickjacking:

    • X-Frame Options are enabled to prevent clickjacking attacks, ensuring that the application cannot be embedded within an iframe by malicious websites.

  • Content Security Policy (CSP):

    • CSP is implemented to control resources the browser is allowed to load, mitigating risks like cross-site scripting (XSS) and data injection attacks.

  • X-XSS-Protection (HTTP Strict Transport):

    • This feature ensures protection against reflected XSS attacks by sanitizing potentially malicious scripts, thus protecting users and their data.

  • Responsive Design:

    • The application is designed to adapt seamlessly to different screen sizes and resolutions, ensuring a consistent user experience across desktops, tablets, and mobile devices.

3 TIER SOLUTIONS

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