Digital verification codes are a common form of verification in network applications. In actual applications, digital verification codes are divided into multiple types, and different types of digital verification codes have different implementation methods and application scenarios. This article will give you a detailed introduction to the types, applications and implementation of digital verification codes.
What is a digital verification code
In practical applications, the digital verification code is the user's naked eye to identify the digital information in the verification code, complete the operation as required, and only after the verification is successful, can a certain function be used. Specifically, the digital verification code also has multiple display forms of pictures, text messages, voices, and videos. The number to be verified can be 4 or 6 digits.
- Digital verification code type
Picture digital verification code : Picture digital verification code includes static pictures, dynamic pictures and digital operation verification codes. The principle of the static picture verification code is to generate a picture from a string of randomly generated numbers, and add some interference to the picture, such as randomly drawing several lines and points to prevent automatic recognition by the machine. The static image is a relatively primitive form of digital verification, and the verification effect is poor, and it is easy to be cracked. Nowadays, there are very few verifications in this way. Digital verification code for dynamic images refers to the use of GIF dynamic image format to display random number verification codes. The numbers on the images are relatively satisfactory, and the verification effect of static images is better, and it is basically eliminated now. Mathematical operation verification code is a verification that can only be completed by entering the answer to the math problem. The security is higher than the number entered in the figure. The difficulty of cracking is greater than the previous two. There will be a few applications now.
SMS digital verification code : SMS digital verification code is a form of verification that transmits numbers through SMS. It has high security and is a very common and effective verification method, but its use cost is higher than that of picture digital verification codes.
Voice digital verification code : The voice digital verification code automatically broadcasts and conveys the verified numbers through voice, which has high security. If the voice verification code fails to be dialed, the system can automatically replay it to ensure that no one is missed. Therefore, as long as the user's mobile phone or landline can answer the call normally, the voice verification code will be received. Voice verification codes have a higher arrival rate, and many companies often use SMS verification codes.
Video digital verification code : The video digital verification code increases the difficulty of cracking by embedding the numbers in the dynamic video, and has high security. However, due to the need for higher technical support, it has not yet been popularized.
- Digits of verification code
In terms of probability, the more numbers, the lower the probability of finding the correct number, and the more difficult it is to crack. The 4-digit verification code is easier to crack, but has less user input and a better user experience. It is often used in operations that require less security. It is more difficult to crack 6 digits, and when passing verification numbers through SMS, there is generally an input time limit. The average time for brute force cracking 6 digits is expected to exceed the input limit of one minute, so the 6 digit SMS verification code is safe reliable.
The purpose of the digital verification code
The digital verification code can prevent some hackers from achieving malicious purposes through machine technology. The specific functions include preventing batch malicious operations and protecting user account security. Batch malicious operations means that hackers use robots to automatically register, log in, swipe posts, swipe tickets, swipe activities, etc. User account security includes application account security and fund account security, to prevent hackers from trying to crack passwords through machines.
Implementation of digital verification code
There are many open code structures on the Internet for digital verification codes for pictures. It is easy for enterprises to develop them independently. However, due to the low security, there are not many using this verification method. The SMS digital verification code and the voice digital verification code are safe and reliable, and are currently relatively common verification methods. Since basic telecommunications services are involved, they generally need to be achieved through the purchase of third-party service providers.
to sum up
Digital verification code refers to a way to complete verification by identifying the digital information in the verification code and performing operations as required. According to the different ways of displaying digital information, digital verification codes can be divided into image digital verification codes, SMS digital verification codes, voice digital verification codes and video digital verification codes. Digital verification codes can help companies prevent malicious operations in batches and protect user account security. In terms of the realization of digital verification codes, SMS and voice verification codes are currently popular verification methods, which are safe and reliable, and are generally realized by purchasing products from third-party service providers. #Safe SMS verification code#
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Author: taro-flavored cat Dian