Solutions to "One Voice" phone fraud

The call-back fee is also known as the call-back fee. This is a common method of fraud, and has exceeded the number of phone scams. This type of fraud usually occurs in the middle of the night, and the phone suddenly hangs up. If you call back, the phone fee is instantly exhausted.

This type of fraud is usually called out in the form of a special dial, which will "bomb" all users in a certain segment, these users will receive calls of the same number within the same period of time. Some users still choose to call back because of their business and work needs, this low-cost scam will generate a lot of revenue.

In principle, China Telecom or mobile operators can use technical methods to prevent spam attacks, abnormal user calls are identified by technical means by human or machine. For example, normal users cannot call ten calls in ten minutes. If the operator finds that a user has called ten calls in ten minutes, when you call a phone number of 11th, you are prompted by voice to ask the user to follow the four "Verification Code" numbers. If the user is correct, the user will dial the phone; otherwise, the dial will be suspended, generally, the "Dialers" do not have the speech recognition function. Therefore, this technical means will prevent all current Dialers from continuing to perform automatic dialing.

The advantage of this technical method is that the implementation is very difficult, and the interference to normal users is very small. Generally, there will be no calls that are frequently made by users, and frequent dial-up in real time. When the system prompts "Verification Code, after entering the correct information, you can still dial normally without affecting your business. scammers have very limited measures to respond to the attacks. The most important thing is the technical difficulty of speech recognition, the computer's automatic speech recognition technology is quite complex. If the speech is subject to noise interference, it is difficult to distinguish and identify it. Even with such software, the success rate of speech recognition is not very high, but the cost is high, modifying the dial will increase the capital cost.

If the scammers manually dial by employing human resources, the operator can increase the length of the voice "Verification Code" based on the dialing frequency, which can greatly increase the fraud cost of scammers, to reduce the fraud efficiency, this inefficient and high-cost fraud method will naturally be no longer used.

Why is this simple and effective technical solution not adopted by carriers? Why have operators always asked users to be vigilant against fraud while shirking their obligations? According to insiders, this type of phone call-back fraud is not only caused by voice stations, but also by operators. In terms of profit sharing, the number of operators accounts for five percent. Perhaps this is the reason why the operator has not blocked such fraud through technical means.