How to prevent hacking a credit card in several seconds

Financial operations have always been the most vulnerable issues, both online & offline, thus, requiring especially fortified security measures on how to prevent hacking.
Online payments remain a weak spot in the credit card security; what is most distressing and scary is that hackers use mere guesswork while sending requests to numerous e-commerce sites. How come it happens and how not to be hacked? Renowned security experts explain that the technique, dubbed Distributed Guessing Attack, can circumvent all the security features (it’s exactly what has happened recently to Tesco customers in the UK).

Basic security tips for not being hacked online.
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