Abstract: There are currently about 700 kinds of cryptocurrency. In addition, more than 3,000 cryptocurrencies are being prepared for development or use. Cryptocurrency consists of a blockchain technique. The blockchain technology ensures transparency and objectivity. In other words, it can handle transparent distributed book transactions using cryptocurrency. Already in the world, cryptocurrency is utilized to achieve digital social innovation. We analyzed the possibility of cryptocurrency and blockchain technology such as dash, Z-cash and monero. These new technologies can be applied in a variety of ways depending on the propriety of the personal information they want to deal with business. This study is expected to help experts who develop or utilize the blockchain policy.