About Ninja CVV
The Luhn Algorithm
Credit card numbers are validated using the Luhn algorithm (also known as the "modulus 10" algorithm), which was created by IBM scientist Hans Peter Luhn in 1954. This algorithm is designed to protect against accidental errors, not fraud.
How the Luhn Algorithm Works:
- Starting from the rightmost digit (check digit), double the value of every second digit.
- If doubling results in a two-digit number, add those digits together to get a single-digit number.
- Sum all the digits in the resulting sequence.
- If the total modulo 10 is equal to 0, then the number is valid.
Card Number Structure
Credit card numbers typically consist of:
- Issuer Identification Number (IIN/BIN): First 6 digits that identify the card issuer
- Account Number: Next 6-12 digits that identify the cardholder's account
- Check Digit: Last digit used for validation
3D Secure Authentication
3D Secure (3DS) is an additional security layer for online credit and debit card transactions, designed to reduce fraud and provide extra protection.
- Common Implementations: Visa Secure (formerly Verified by Visa), Mastercard Identity Check, American Express SafeKey
- How it Works: Adds an authentication step during checkout, typically requiring a password, one-time code, or biometric verification
- Support Varies: Not all cards support 3D Secure, and implementation varies by issuer and region
Visa
Starts with 4, length: 16 digits
Format: 4XXX XXXX XXXX XXXX
Mastercard
Starts with 51-55, length: 16 digits
Format: 5XXX XXXX XXXX XXXX
American Express
Starts with 34 or 37, length: 15 digits
Format: 3XXX XXXXXX XXXXX
Discover
Starts with 6011, length: 16 digits
Format: 6011 XXXX XXXX XXXX
JCB
Starts with 35, length: 16 digits
Format: 35XX XXXX XXXX XXXX
UnionPay
Starts with 62, length: 16-19 digits
Format: 62XX XXXX XXXX XXXX
This tool is provided for educational and testing purposes only. The generated card numbers are mathematically valid but are not connected to real accounts or payment systems. Using these numbers for fraudulent purposes is illegal and unethical.
This application runs entirely in your browser. No data is sent to any server, and no information is stored or tracked. Your card numbers and validation results remain private and secure on your device.