According to Slow Mist Technology, ransomware has become one of the biggest security threats in the world. More than 99% of ransomware is traded using BTC. So far, the price of BTC has risen to more than 10,000 US dollars. The number of ransomware attacks is also increasing. According to the statistics of Malwarebytes, the global blasting of the TO B virus has increased by 363% since June 2018, and the price of BTC has also risen. The hackers are now seeing the digital currency. In the market, the digital currency is attacked mainly by the following methods: 1. Attacking the blackmail virus and directly extorting the BTC; 2. Stealing the victim digital currency wallet through malicious programs; 3. Attacking through the digital currency website vulnerability, Stealing digital currency.