Smart Card Validator System
1. Introduction
CardShield is a web-based application designed to validate card numbers using the Luhn Algorithm.
2. Objectives
- Implement Luhn Algorithm
- Detect card type
- Validate expiry date
- Create modern UI
3. Scope
This system performs client-side validation only and does not connect to banking systems.
4. Technologies
- HTML
- CSS
- JavaScript
5. Features
- Luhn validation
- Card detection
- Expiry check
- Live preview
6. Luhn Algorithm
Validates numbers by doubling alternate digits and checking divisibility by 10.
7. UI Design
Clean, responsive layout with modern styling and proper spacing.
8. Security
No data is stored or transmitted. All validation is local.
9. Advantages
- Fast
- No internet needed
- Easy to use
10. Limitations
- No real verification
- Possible false positives
11. Conclusion
CardShield demonstrates validation logic with modern UI, combining functionality and usability.