Scenario 16: User Authentication System

Problem Statement: Implement user authentication in an application.

Detailed Scenario: The system must authenticate users using a username and password, with passwords stored as hashes for security.

Use Case Approach: Use Python’s hashlib for password hashing and compare the stored hash with the entered password.

Tools and Modules: hashlib, os

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Approach:

• When a user registers, their password is hashed using Python’s hashlib module before storage.
• During login, the entered password is hashed and compared to the stored hash to authenticate the user.
• The os module generates a random salt for each password, enhancing security.
• Password hashes and salts are stored securely, not the plain text passwords.

Python Modules Used:

• hashlib – Provides secure hash functions for password hashing (e.g., SHA-256).
• os – Generates cryptographically secure random salts for password hashing.

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