Now let's make an assumption of a credit card being stolen and used without authorization after being lost. Let's first take a look at the credit cards which use password or "password + signature" for consumption: if the password is not leaked, the lost credit card with password protection is indeed relatively safe to use, and this is the important reason why many people choose to use credit cards with password protection. However, entering passwords in various occasions frequently will significantly increase the probability of password leakage.