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

Ciphertext Alone," <br>

Reeds, Ritchie, Morris, 1978. <br><br>

<a href="https://t.co/MbE5UNMtzb">

https://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf</a><br>

<br>

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

paper.<br><br>

Back story:<br><br>

<a href="http://bell-labs.com/usr/dmr/www/crypt.html" eudora="autourl">

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

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