What is a Card Testing Attack?

A card testing attack is a technique used to verify the validity of stolen credit card information. It involves using the stolen card details to make small purchases or check the card's status online. This method is commonly used by cybercriminals to ensure that the stolen card is active and has not been reported lost or stolen.

How Does a Card Testing Attack Work?

Cybercriminals obtain stolen credit card information, which typically includes the card number, expiration date, and CVV (Card Verification Value). They then use this information to make small purchases or attempt to withdraw cash from ATMs. If the transaction is successful, it confirms that the card is active and has not been blocked.

Methods of Detection

Financial institutions and payment processors use various methods to detect card testing attacks. These include monitoring for unusual transaction patterns, such as multiple small purchases in a short period, and implementing strict CVV verification procedures.

Prevention Strategies

Consumers can take several steps to prevent falling victim to a card testing attack. These include regularly monitoring bank statements for unauthorized transactions, using two-factor authentication for online purchases, and being cautious when sharing personal financial information online.