(CardVerificationValue), that is, the credit card verification value. The display position is on the back of the credit card, and the top of the signature is displayed in italics. The first four digits are the card number and the last three digits are the verification code, that is, the last three digits.
Note that this verification code does not refer to the password of the credit card, just enter the bank card number and its last three digits, and the validity period of the credit card, and there is no password at all.
Extended data:
In order to effectively prevent this problem, specific registered users keep trying to log in with specific programs to crack it. In fact, verification code is a popular way for many websites (such as online personal bank of China Merchants Bank and QQ community of Tencent), and we have also realized this function in a relatively simple way.
Although logging in is a bit troublesome, this function is still necessary and important for the community. However, we still remind everyone to protect their passwords, try to use passwords with more than 6 digits, letters and symbols, and don't use simple passwords such as 1234 or passwords that are the same as or similar to the user name.
Don't set a password just because you come to iclub to ask questions. Protecting your password is also protecting yourself, so as not to steal your account and bring yourself unnecessary trouble.
Baidu Encyclopedia-Last Three Codes