[COFF] Glenn Henry's Museum

[Rudi Blom]

>From the museum pages via the KG-84 picture to wiki. Reading a bit on
crypto devices, stumbling over M-209 and

"US researcher Dennis Ritchie has described a 1970s collaboration with
James Reeds and Robert Morris on a ciphertext-only attack on the M-209
that could solve messages of at least 2000–2500 letters.[3] Ritchie
relates that, after discussions with the NSA, the authors decided not
to publish it, as they were told the principle was applicable to
machines then still in use by foreign governments.[3]"
https://en.wikipedia.org/wiki/M-209

The paper
https://cryptome.org/2015/12/ReedsTheHagelinCipherBellLabs1978.pdf
ends with
"The program takes about two minutes to produce a solution on a DEC PDP-11/70."

No info on the program coding.

More info around the story from Richie himself
https://www.bell-labs.com/usr/dmr/www/crypt.html