A person with an interest in encryption and privacy, especially one who uses encrypted email(noun)
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Use "cypherpunk" in a sentence
"St. Jude Milhon, a former Mondo 2000 editor and prominent hacker who coined the term "cypherpunk," passed away Saturday morning in Berkeley after a long battle with cancer."
"Eric Hughes runs the "cypherpunk" mailing list dedicated to "discussion about technological defenses for privacy in the digital domain.""
"This guest posting ex-cypherpunk mordaxus at Emergent Chaos gets how judges think."