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Password Strength Analyzer

Cyber Security | HTML, CSS, JavaScript | Mini Project

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Project Overview

  • • Browser-based cybersecurity awareness tool
  • • Real-time password analysis
  • • Local client-side processing
  • • No server, database, or API

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Problem Statement

  • • Users may not recognize weak patterns
  • • Need immediate understandable feedback
  • • Basic analysis can be performed locally

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Objectives

  • • Analyze password characteristics
  • • Calculate heuristic score
  • • Detect common/repeated/sequential patterns
  • • Provide suggestions

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Technology Stack

  • • HTML5
  • • CSS3
  • • JavaScript
  • • Modern web browser

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System Architecture

  • Password Input → JavaScript Analysis → Character & Pattern Checks → Score → Suggestions → UI

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Core Features

  • • Real-time scoring
  • • Length/category checks
  • • Common-password detection
  • • Repeated/sequential pattern checks
  • • Show/hide
  • • Clear
  • • Responsive UI

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Privacy Approach

  • • Analysis runs in browser
  • • No backend required
  • • No intentional password transmission
  • • Not a password vault

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Testing

  • • Empty and short inputs
  • • Mixed character categories
  • • Repeated/sequential patterns
  • • Common-password patterns
  • • Show/hide and clear
  • • Responsive layout

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Limitations

  • • Heuristic, not a security proof
  • • Cannot know every breached password
  • • Does not evaluate an entire authentication system

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Future Enhancements

  • • Better entropy estimation
  • • Privacy-preserving breach checks
  • • Password generator
  • • Accessibility/localization
  • • Larger pattern datasets

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Conclusion

  • A lightweight project demonstrating JavaScript event handling, DOM updates, pattern analysis, responsive UI, and practical cybersecurity awareness.