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December 4, 2016 02:00 pm

Crooks Need Just Six Seconds To Guess A Credit Card Number

schwit1 quotes The Independent: 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."

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