According to the Legal Daily News, Deng Jianpeng, a professor at the School of Law of the Central University of Finance and Economics, said in an interview that the most mature application of the current blockchain is mainly in the financial sector. In addition, the blockchain is in the areas of deposit, confirmation, and anti-counterfeiting. The application prospects are also very broad. For example, Deng Jianpeng can use the blockchain to invoice. In the past, there were invoice frauds, including various bills, bank acceptances, money orders, etc., which could be falsified. Now, through the blockchain to invoice and bills, these frauds can be largely avoided. In Deng Jianpeng's view, perfecting the encryption and authorization of data can effectively avoid data leakage. “The blockchain itself is distributed encryption. For example, in the medical field, patients go to the hospital for examination, which involves the privacy of the patient. If the personal information is on the blockchain, it can be encrypted. In the case of personal authorization, The other party can see the patient's information, so that the problem of leaking can be effectively avoided."