[GreenKeys] NSA 5-level tape on poster

[Nick England]

I came across this NSA poster showing 5-level tape, evidently with a 6th
punch to show rubbed-out characters. Was this a common feature or something
special for the crypto world?
http://www.navy-radio.com/tty/reperf/nsa-security-tape.pdf

The slant of the tape in the photo makes it a bit painful to read, but I
did see that one section says -
...his unique contributions and achievements materially aided....

If you are desperate for entertainment, please decode some more and let us
know what it says...

Cheers,
Nick England K4NYW
www.navy-radio.com
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