At the end of 1992, several retired technical engineers and scientists in the United States invited a group of colleagues and friends to a private party. During the party, they discussed cryptographic issues and some tricky programming. The more they talked, the more excited they became. The number of parties increased. Later, one of the cryptographers proposed to name the organization "Cypherpunk", which introduced the password word cypher to protect people's privacy. With the continuous development of the cypherpunk members, a mailing list group was established to facilitate communication between members from different regions. Because of the ability to protect privacy, everyone can speak freely during communication. Various latest ideas and technical concepts continue to pop up, and a large number of themes are freely discussed. The number of members has also grown to more than 1,400. Many IT elites have been integrated into it, and many interesting technical development attempts have been made. Before Satoshi Nakamoto threw out the Bitcoin white paper, there were dozens of digital currencies that had been discussed and failed in the cypherpunk mailing group.