Knowledge of mobile phone verification code

ASP to implement mobile phone verification code:
First enter the mobile phone number, and then generate a verification code by random number, through the SMS interface, sent to the mobile phone number entered.
There are two ways to save a verification code:
1. Save in session or cookie and expire as session or cookie expires.
2. Store the verification Code and Verification Code expiration time in the database, and then verify that the input is correct when you click confirm (more commonly used methods).

Select the appropriate SMS interface based on the size of the send volume:
If the sending volume is large, you need to work with China Mobile or unicom and other communication operators, they will give you a port, through this port can be combined with other programs to send;
If the sending volume is very small, then you can connect through the GSM/GPRS modem and computer, insert a SIM card, the related development package can be found in the software of the modem, through the development of the program interface in the package, but also can and other such as asp,php,jsp,. NET and other programs. Of course, this method is charged according to the amount of text messages sent by your SIM card.

1. SMS Platform:
Bulk SMS platform is based on China Mobile, Unicom, telecommunications directly provided by the SMS port and the Internet connection to achieve with the customer specified number of SMS bulk send and custom sent,
It is divided into software single version (with client) CS structure and network share version of the BS structure.

2. Cloud SMS:
Compared with the traditional SMS platform or bulk SMS software, the cloud SMS platform has online self-help, simple registration, on-demand pay, with the purchase, low price, no installation, maintenance free.
or monthly payment, support single-point or multi-point login, with openness and other functions, can seamlessly link OA, ERP, website and other business systems, to achieve unified management and scheduling of network services resources,
Deliver on-demand, on-demand, communication services to your business.

Cloud SMS Service because of its safe and reliable, fast, inexpensive, easy to use, pay-as-you-go convenience, value-for-money marketing effect return and quality service has won the trust of the majority of enterprises,
Gradually become the majority of small and medium-sized enterprises to carry out SMS marketing, mass SMS, SMS promotional tools, such as the favorite. There are a lot of companies that provide such services, the simple way is, similar to the activation code, sent when the record in the database, verify the success of the time blank

Knowledge of mobile phone verification code