[Boatanchors] Re: An/GRC 109 - Re: Cipher system

[Greg Mijal]

Hi Ken:
Excellent progress Ken
Your jump page shows the exact correct thing. Every SF operator had one of
these in his pocket. That's it! The WWW version is a little hard to read in
some spots. The technical name for Diana is Polyalphabetic non-repeating
cipher system. Grab a sheet of paper and make up a 2 group "secret" pad. The
letters will be AEXPW LBULC

Here's the way it works:
you just copied a 2 letter group off the radio and wrote it on a piece of
paper.
It's
SBRUW OQAPW
Now Whip out your Diana "SECRET" pad aka one-time pad, and start writing the
received message above the Diana code groups.
Note all the "secret" pad stuff is just a series of random 5 letter groups.
The transmitter and receiver have exactly the same pad and begin at exactly
the same place
So now you see:
LBRUW OQAPW - received
AEXPW LBULC   - the secret stuff
Now get out your Tri-Graph and start decoding.
Per the TRI-GRAPH (Look first at the very most left vertical column for the
S, then look between the top and bottom lines going horizontally for the
combination S and A
L and A are always equal to O
B and E are always equal to U
R and X are always equal to L
U and P are always equal to Q
W and W are always equal toG
The first group decodes to OULQG we called that clear text and is what the
transmitter intended to tell you.
OK?
I have a field assignment for you. Set your 109 up and get ready to receive.
This message is really important so don't stop to oogle the natives girls!
Oh yeah, Here's your secret Diana pad aka one time pad of three secret
groups, don't loose it trooper!
ONQQB QLFOZ PNXAG
Here comes the encrypted message:FBYNX OICUG ZI
QSL?
GREG
WA7LYO
in sunny Feenix



----- Original Message -----
From: "Kenneth G. Gordon" <kgordon at moscow.com>
To: "Greg Mijal" <bluebirdtele at earthlink.net>
Sent: Sunday, February 06, 2005 10:36 AM
Subject: Re: An/GRC 109 - OTP


> I started the Clandestine Radios list last night. Didn't get it finished
yet
> since the telnet client I use here at home doesn't have the same
> capability as my UNIX system at work needs, but at least it is started.
>
> Going to start the Website Monday.
>
> BTW, check out the following URL:
>
> http://www.militaryradio.com/spyradio/otp.html
>
> and tell me if the SF use of the OTP was similar to this. The way it is
> explained here makes more sense to me than the "Tri-Graph"
> mentioned on the URL you sent to me. I don't understand the Tri-Graph
> and have studied that for several hours now. Perhaps when I printed off
> that page, something got missing.
>
> Ken W7EKB