FYI patent application 20010055396
Newton Hammet
newton@hammet.net
Sat Jan 5 07:14:02 2002
This is a multi-part message in MIME format.
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Hello Gnupg Users and Developers,
I was doing some research in software encryption patent applications
and came across the following item:
------------------------------------------------------------------------
United States Patent Application
20010055396
Kind Code
A1
Jevans, David December 27,
2001
------------------------------------------------------------------------
Mechanism for efficient private bulk messaging
Abstract
Secure bulk messaging mechanism in which, roughly described, a sender
first
encrypts a message once. The message can be decrypted with a message
decryption key. These can be symmetric or asymmetric keys. For each
recipient, the sender then encrypts the message decryption key with the
recipient's public key. The sender then sends the encrypted message and
the
encrypted message decryption keys to a store-and-forward server.
Subsequently, one or more recipients connect to the server and retrieve
the
encrypted message and the message encryption key that has been encrypted
with the recipient's public key. Alternatively, the server can forward
these
items to each individual recipient. The recipient then decrypts the
encrypted message decryption key with the recipient's private key,
resulting
in an un-encrypted message decryption key. The recipient then decrypts
the
message using the un-encrypted message decryption key.
The details of this patent application have been attached as a text file
to
this email.
I believe that gnupg is already using this or a very similar process
(multiple public-key encryptions of the same symmetric key, each as a
packet, followed by the file that has been encrypted by said symmetric
key
thus allowing for bulk-style secure delivery of an encrypted message to
several recipients each having a public key and secret key to match one
of the public-key-encryption-of-symmetric-key packets).
I know a little bit about cryptography and far less about legal issues
raised
here, and whether or not the patent description actually covers the
process
that gnupg-1.0.6 is already using. And also it is only a patent
application,
not a granted patent. Don't know if FSF has some legal eagles that can
take a look at this or already know about this.
The webpage I searched was: http://www.uspto.gov/patft/index.html
GNU, Crypto Guru's, and/or interested parties are invited to 1) discuss
and/or 2) correct me for any apparent misconceptions demonstrated here.
Regards, Newton
--
Information, Knowledge, and Wisdom
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