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Text File  |  1992-12-24  |  917 b   |  20 lines
  1. Newsgroups: sci.crypt
  2. Path: sparky!uunet!spool.mu.edu!uwm.edu!linac!att!att!dptg!ulysses!ulysses!smb
  3. From: smb@research.att.com (Steven Bellovin)
  4. Subject: Re: PKP patents (legal question)
  5. Message-ID: <1992Dec24.125347.6627@ulysses.att.com>
  6. Date: Thu, 24 Dec 1992 12:53:47 GMT
  7. References:  <168C761F.UC445585@mizzou1.missouri.edu>
  8. Organization: AT&T Bell Laboratories
  9. Lines: 9
  10.  
  11. In article <168C761F.UC445585@mizzou1.missouri.edu>, UC445585@mizzou1.missouri.edu (John M. Kelsey) writes:
  12. >    Does PKP hold patents to *all* forms of public-key cryptology, including
  13. > those methods still undiscovered?  Or do they simply hold the patent to
  14. > all public key methods currently known?  Or neither?
  15.  
  16. There are claims in some of their patents that appear to claim all forms
  17. of public key cryptography and public key distribution systems (i.e.,
  18. Diffie-Hellman).  It isn't clear to me that those claims would withstand
  19. attack.
  20.