What is the verification code of the bank card number?

The additional code of mobile banking can be understood as verification code, which generates a picture by a series of randomly generated numbers or symbols, and adds some interferon to the picture (to prevent OCR).

Users can identify the verification code information with naked eyes, enter the form and submit it to the website for verification. Only after the verification is successful can they log in to mobile banking. So the additional code of mobile banking is the number you want to verify. When you open the mobile banking to fill in the data, it will have an extra code for you to fill in.

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.

Universal verification code for extended data

1, four-digit, random one-digit string, the most original verification code, the verification effect is almost zero.

2.CSDN website users log in in GIF format, which is a commonly used random digital picture verification code. The characters in the picture are quite satisfactory, and the verification effect is better than the last one.

3.QQ website users log in in PNG format, with random numbers and randomly capitalized English letters for pictures.

Pay attention to the following aspects when using mobile banking:

First, install anti-virus software in the mobile phone;

Secondly, it is necessary to set the access password of sensitive applications, and once the mobile phone is lost, immediately destroy the mobile phone data remotely;

Finally, don't install unknown and potentially dangerous programs on your mobile phone.

Baidu Encyclopedia-Additional Code