Cypherpunk is a term used to describe a loose group of activists, computer programmers, and cryptographers who advocate for the use of cryptography and related technologies as a means to protect civil liberties and personal privacy, especially in the digital realm. The cypherpunk movement began in the late 1980s and early 1990s and is considered to be the precursor to the modern cryptocurrency movement. Cypherpunks are known for their strong belief in the power of cryptography to protect individual freedom and privacy, and their view that governments and corporations should not be able to access or monitor personal data without explicit permission from the user.