Years ago, I acknowledged on my web page that the Crypto
Museum web site had a description of the KL-7 rotor machine,
but I had not included a description of it on my own web page.
The other day, I stumbled on that description again, and decided
it was high time for me to include this information on my page
also; it is now present at
http://www.quadibloc.com/crypto/ro020703.htm
And in addition, while I was visiting the site, I looked at the
page for the KW-7; while it did not include a description of
the machine's cipher, it did include some documentation,
including a manual with "Theory of Operation" in the title,
declassified in 2006, the same year the KL-7 was declassified.
After contacting the Crypto Museum about this, I have decided that
it is genuinely unlikely that I would be endangering the national
security of the United States by proceeding with a web page on
what I was able to glean from that manual, and so I attempt to
describe the KW-7 on this page:
http://www.quadibloc.com/crypto/co4815.htm
John Savard