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- Newsgroups: sci.crypt
- Path: sparky!uunet!spool.mu.edu!umn.edu!csus.edu!netcom.com!rcain
- From: rcain@netcom.com (Robert Cain)
- Subject: Re: (was: Re: Public key patents in Europe?)
- Message-ID: <1992Oct13.064611.29230@netcom.com>
- Organization: Netcom - Online Communication Services (408 241-9760 guest)
- References: <1992Oct12.225218.16323@nwnexus.WA.COM>
- Date: Tue, 13 Oct 1992 06:46:11 GMT
- Lines: 39
-
- ken@halcyon.com (Ken Pizzini) writes:
- : In article <bontchev.718919860@fbihh> bontchev@fbihh.informatik.uni-hamburg.de writes:
- : >From the RSA FAQ, page 4, answer to question 1.5:
- : >
- : >"The authors of patent 4,218,582 claim that it applies to all uses of
- : >public-key cryptography. It has been patented throughout the world."
- :
- : Okay, this is the second time I've heard this, and it doesn't make
- : sense to me. I thought Diffie and Hellman invented (and published)
- : public-key cryptography before RSA was invented? Do I have a
- : misunderstanding (feel free to correct me), or is it just PKC that
- : is based on the difficulty of factoring that is covered by the PKP
- : patent? (Or did I misidentify the patent number above?)
- :
- : --Ken Pizzini
-
- This is the Diffie-Merkle patent. It is owned by PKP as well as the
- first Hellman-Diffie-Merkle patent 4,200,770. These did in fact precede
- RSA but since PKP owns them anyway, it doesn't matter. I believe though
- that it does matter that the second patent claims something invented
- in the first but not specifically claimed, the entire concept of public
- key. There is opinion that the claims in the second patent would not
- stand anyway because the knapsack method described as an embodyment is
- not in fact secure and as such isn't a valid method of cryptography.
-
- That's what sucks about this patent system, it doesn't matter really
- whether the patent is valid, what matters is whether one has the money
- to prove it isn't. I'm not sure what the answer to that problem is
- either. Consortium anyone?
-
- Bob
- --
- Bob Cain rcain@netcom.com 408-358-2007
-
- "There are some strings. They're just not attached."
- Victoria Roberts
-
-
- PGP 1.0 or 2.0 public key available on request.
-