NSA Museum Library has provided "Hagelin M-209 Cryptanalysis from Ciphertext Alone"

[John Young]

NSA Museum Library has provided "Hagelin M-209 Cryptanalysis from 
Ciphertext Alone,"
Reeds, Ritchie, Morris, 1978.

<https://t.co/MbE5UNMtzb>https://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf

NSA would not release it under FOIA, claiming it was a private paper.

Back story:

http://bell-labs.com/usr/dmr/www/crypt.html

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