The Cypherpunk Manifesto is a document written by Eric Hughes in 1993 that outlines a vision of a future where individuals and groups communicate and interact securely and anonymously on the internet. It emphasizes the importance of privacy and individual freedom in the digital age, and argues for the use of cryptography as a tool to protect these rights. The manifesto proposes a number of measures that individuals and groups can take to secure their data, such as using encryption and digital signatures to protect personal information, and developing and promoting decentralized technologies like peer-to-peer networks. The document has become a foundational text of the Cypherpunk movement, which promotes the use of cryptography and other technologies to protect civil liberties.