Ms. Zhang is a white-collar worker who likes to share her life in a circle of friends. Not long ago, she applied for a credit card. Because the card face is very delicate and beautiful, Ms. Zhang habitually photographed the front of the credit card and the back with her signature and sent it to a circle of friends. However, a week later, Ms. Zhang received an overdraft bill from the bank, showing that her credit card had spent tens of thousands of yuan on an e-commerce platform.
after investigation, it was found that it was not an outsider who stole her credit card for spending, but her WeChat friend. Because her friends can clearly see the card number, security code and other information, she got greedy and tried to use Ms. Zhang's birthday as a password for consumption, but she really succeeded.
PS and mosaic are not safe either.
many people choose to process sensitive information instead of exposing their credit cards in broad daylight.