"The anti fraud of science and technology is a lasting war, and cross platform technology joint defense is crucial." Recently, an academic exchange meeting was held in Hangzhou around the theme of "the role of law and technology in anti fraud". At the meeting, Jin Hong, director of the security risk control intelligence department of Ant Group, said that it was necessary to build a full link technical defense line and enhance the anti fraud awareness of the whole society. In December 2022, the Anti Telecommunication Network Fraud Law of the People's Republic of China (hereinafter referred to as the Anti Telecommunication Network Fraud Law) was officially implemented, It is clear that "the state supports telecommunications business operators, banking financial institutions, non bank payment institutions, and Internet service providers to research and develop anti fraud technologies related to telecommunications network fraud, which can be used to monitor, identify, dynamically block, and deal with abnormal information and activities involving fraud." Gao Yandong, vice president of the Digital Rule of Law Research Institute of Zhejiang University, said that he supports the use of good faith technologies to fight against malicious technologies, leaving no hiding place for fraudsters, One of the highlights of the Anti Telecommunication Network Fraud Law is to stop at the source, prevent in the process and solve cases afterwards. Concern about personal information leakage, such as App crawlers, insider reselling, weak privacy awareness, limited server prevention and control capabilities for storage media and information, will lead to the same problem - personal information leakage. According to the research report of China Judicial Big Data Research Institute, from 2017 to 2021, courts at all levels in China concluded more than 282000 information related cyber crimes in the first instance, with the number of cases rising year by year. "Citizen personal information is the means of production of telefraud." Gao Yandong took an example. In August 2022, the network security department in Wuxi, Jiangsu found that a company directly stored the online recruitment information that it purchased and collected on a daily basis on the company's database server, involving 89 million pieces of personal recruitment information of citizens, which can be downloaded freely on the Internet, which is easy to be used by telefraud gangs. He said that fraudsters will not only spread their nets to carry out illegal and criminal activities, but also carry out precision fraud, especially on the premise of having sufficient personal information of the victim. In Jin Hong's view, fraud is essentially an act of using information asymmetry to cheat money after the mafia masters a large number of technologies. Making data available and invisible is the technical direction that AI technology needs to focus on in the future. The Anti Telecommunication Network Fraud Law clearly stipulates that telecommunication business operators and Internet service providers shall take technical measures to timely identify and block the access of illegal equipment and software to the network, and report to the public security organ and the competent department of the relevant industry. Gao Yandong suggested that, for Internet enterprises and financial institutions, in particular, they should strengthen internal management, clarify the post authority that can access personal information, and be able to trace back to the source; At the same time, a plan mechanism and a self inspection and self correction mechanism shall be established. Once information leaks, technical remedies can be taken. We should focus on front-end prevention. Now, with the help of public opinion, legal documents and other information, the application of intelligent perception risk control system to extract fraud elements and predict fraud dynamics is becoming more and more mature. "Alipay's AI system has been able to automatically identify more than 50 fraud techniques, such as PS fraud." Jin Hong introduced that the anti fraud risk perception and decision-making system they built should conduct a full link interactive game against fraud, through 10 cents