A secret name or code name used to conceal someone's real identity, especially in espionage, military operations, or confidential work.
From Greek 'kryptos' (hidden) + 'onym' (name). The term gained prominence during Cold War spy operations when intelligence agencies used cryptonyms for covert projects and agents.
Famous cryptonyms like 'Codeword: Venona' and 'Operation Paperclip' show how secret names can hide massive historical events in plain sight—entire spy programs reduced to mysterious-sounding codenames that nobody understood!
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