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Message: <blockquote data-quote="dennishoddy" data-source="post: 4257497" data-attributes="member: 5412">zero errors. The teletype then had the IBM ball. The most sensitive information available in the day was put on the teletype with the hard copy filed according to classification, the tape was then taken to a computer to be condensed and transmitted via KG-13 Crypto gear. The code used has never been broken to this day. The government technology was way ahead of the old AP 45.5 baud teletypes you heard of. We were in the "red room" where encrypted messages were unencrypted on both the sending and receiving end. At the end of the shift, the ribbons and the roller the ribbon that was typed on had to be hand carried and logged into an incinerator to be destroyed by a second party, witnessed by us. A new roller and ribbon were then issued to be installed before the next shift with witnesses signing off. Pretty secure operation.</blockquote>