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Keywords: NSA Punch Verification and Print system.jpg en Punch Verification and Print system developed in the late 1970s and used by the U S National Security Agency to mass produce cryptography keys on punched tape https //www nsa gov/about/cryptologic-heritage/historical-figures-publications/publications/misc/tale-of-the-tape shtml NSA/CSS May 3 2016 PD US NSA Cryptographic devices NSA encryption devices Punch tape hardware PD-USGov |