Criminals can work out the card number, expiration date, and security code for a Visa debit or credit card in as little as six seconds using guesswork, researchers have found… Fraudsters use a so-called Distributed Guessing Attack to get around security features put in place to stop online fraud, and this may have been the method used in the recent Tesco Bank hack

According to a study published in the academic journal IEEE Security & Privacy, fraudsters could use computers to systematically fire different variations of security data at hundreds of websites simultaneously. Within seconds, by a process of elimination, the criminals could verify the correct card number, expiration date and the three-digit security number on the back of the card.
One of the researchers explained this attack combines two weaknesses into one powerful attack. "Firstly, current online payment systems do not detect multiple invalid payment requests from different websites… Secondly, different websites ask for different variations in the card data fields to validate an online purchase. This means it’s quite easy to build up the information and piece it together like a jigsaw puzzle."

rest at https://it.slashdot.org/story/16/12/04/059249/crooks-need-just-six-seconds-to-guess-a-credit-card-number

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s