How to get SMS verification code?

How to get SMS verification code? Because of the convenience of mobile terminals, many websites and applications on the network now have the function of binding users' mobile phones. There are many benefits, such as account login, password modification, online payment and other functional modules can be combined with mobile phones to obtain verification code short messages in real time to ensure the safety of users' operation. Here's how to get the SMS verification code.

How to get SMS verification code? About the realization of this whole function module, it is roughly divided into three steps:

(1) The front-end triggers to obtain the verification code, and synchronously displays the countdown of verification validity;

(2) the background sends a verification short message through the proxy platform;

(3) The user submits the verification information, and the background logic judges and processes it.

How to get the SMS verification code;

Verification code is an "inverse Turing test", that is, to distinguish between computers and people, in order to prevent computers from impersonating people to perform certain operations. The cause of the verification code is that a website conducted an online voting to evaluate which school is better. Students from MIT and another school wrote a script and used it to automatically swipe their cards. The result is, of course, that the votes of these two schools are far ahead. If you have a verification code, you need to verify the identity of the operator every time you register, so it is very difficult to automatically brush it.

The principle of how to obtain SMS verification code;

Vernacular version: the platform of SMS verification code is different from the user's vision (the image is processed by neurons, and it is a very complicated process to see the whole first, and then refine it locally) and the computer's view of the image (pixel unit, RGB value, essentially processing a matrix). The purpose of verification code design is suitable for human beings to see, make people feel comfortable and easy to identify, so that computers can not automatically identify life and death.

Professional Edition: The principle of this technology is mainly: the background sends out a random code (easy to remember, we name this random code X) to respond. The webpage client combines the user information with the random code X through an algorithm (such as MD5), generates a character string after processing (for easy memory, we name this character string Y), and returns it to the background; The background uses the same algorithm to process this random code X and the user information stored in the background to get a string Z.

The background compares the string y from the client with the string z generated by itself, and if they are consistent, confirms the user identity or transaction result. Why is there such a service as verification code now? The verification code of SMS is generally to prevent people from automatically registering in batches through robots, and constantly logging in through violent cracking of specific programs, and splashing water on specific registered users. Prevent the brushing behavior, ensure one machine and one yard, and ensure that the interests of enterprises are not harmed.

How to get the verification code of SMS has been listed above for you. The causes and uses of SMS verification code are also introduced to you. If you want to know more about mobile phone verification code, you can read related articles.