M-209 Cipher (or, "THE HAGELIN CIPHER MACHINE (M-209): Cryptanalysis from Ciphertext Alone")

[Jeffrey Walton <noloader () gmail com>]

> From John Young on the Cryptography mailing list: "THE HAGELIN CIPHER
MACHINE (M-209): Cryptanalysis from Ciphertext Alone",
http://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf.

The M-209 cipher is historically significant because it was
essentially the first crypt program used on Unix to digest password.

In "Password Security: A Case History"
(http://cs-www.cs.yale.edu/homes/arvind/cs422/doc/unix-sec.pdf),
Morris and Thompson discuss Hagelin's patent for the cipher and being
visited by the NSA after their analysis. But I was never able to find
the paper online.
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