Still locked up Shannon crypto work?

Steven M. Bellovin smb at
Wed Apr 16 12:41:04 EDT 2008

On Mon, 07 Apr 2008 08:53:44 -0700
Ed Gerck <edgerck at> wrote:

> "Consider Shannon. He didn?t do just information theory. Several
> years before, he did some other good things and some which are still
> locked up in the security of cryptography."
> Shannon's crypto work that is "still [1986] locked up"? This was
> said (*) by Richard W. Hamming on March 7, 1986. Hamming,
> who died when he was almost 83 years old in 1998, was then a
> Professor at the Naval Postgraduate School in Monterey, California.
> He was also a retired Bell Labs scientist.
> Does anyone about this or what it could be? Or if Hamming was
> incorrect?
I've heard that there were some patent applications with secrecy
orders. though I thought those were release by the late 1980s.

		--Steve Bellovin,

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