Thread View: sci.crypt
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5 total messages
Started by Tim Tessin
Mon, 28 Sep 1987 16:48
Re: public key encryption and RSA patent status
Author: Tim Tessin
Date: Mon, 28 Sep 1987 16:48
Date: Mon, 28 Sep 1987 16:48
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In article <10307@duke.cs.duke.edu> srt@duke.UUCP (Stephen R. Tate) writes:
>
> I mentioned before that I have a copy of a public key cryptosystem
> using RSA that has been released in the public domain. So how is
> this effected? One possible point is that the person who wrote it
> lives in Canada. Does this mean he doesn't have to abide by US
> Patents? How about importing such a thing into the US? Maybe the
> guy is just not aware that it is patented and should be notified?
Or he doesn't care. Legally, it is RSA's job to go after him and anyone
using that "public domain" version. If they don't, then the patent rights
can be challenged on the basis that they don't enforce them.
What are the chances of getting caught if you are not distributing the
stuff? Probably, close to zero. We have been
advised by our legal staff to always go to the source of a "public domain"
release and obtain the necessary information from the author to insure
that the stuff is really "public domain" before we incorporate it into
anything other than our own hacking.
Tim Tessin - Lawrence Livermore National Laboratory
Phone: (415) 423-4560 / 422-8971
ARPA: tjt@lll-tis.ARPA
UUCP: {ihnp4,dual,sun}!lll-lcc!lll-tis!tjt
Re: public key encryption and RSA patent status
Author: Bob Bickford
Date: Tue, 29 Sep 1987 11:20
Date: Tue, 29 Sep 1987 11:20
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[Line eater? WHAT line ea
If you have information about the person who has released a public-domain
program that implements an algorithm similar to the RSA one, please send
me the info (or post it) on how to obtain a copy. BBS numbers, or
whatever.
--
Robert Bickford {hplabs, ucbvax, lll-lcc, ptsfa}!well!rab
/-------------------------------------v-------------------------------------\
| Don't Blame Me: I Voted Libertarian | Ron Paul: Libertarian for President |
\-------------------------------------^-------------------------------------/
Re: public key encryption and RSA patent status
Author: mitch
Date: Wed, 30 Sep 1987 17:04
Date: Wed, 30 Sep 1987 17:04
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In article <107@lll-risky.arpa> tjt@lll-tis.arpa (Tim Tessin) writes: >In article <10307@duke.cs.duke.edu> srt@duke.UUCP (Stephen R. Tate) writes: >> >> Patents? How about importing such a thing into the US? Maybe the > >Or he doesn't care. Legally, it is RSA's job to go after him and anyone >using that "public domain" version. If they don't, then the patent rights >can be challenged on the basis that they don't enforce them. >What are the chances of getting caught if you are not distributing the >stuff? Probably, close to zero. We have been I expect that one of the characteristics of a "good" encryption scheme is that it is this side of impossible to demonstrate from the encrypted message which scheme was used to encrypt the original. Because of this difficulty I wonder if the patent holders of RSA could ever prosecute anyone for *using* RSA. That difficulty may prove an interesting point should someone try to take them to task for non-enforcement. Well, I think that the RSA patent holders need to get off their duff and get their invention out as a product. A lot of us would use it if priced in a reasonable way. Selling or advertising such a product is another topic. Thanks for the Soap. Thomas P. Mitchell (mitch@stride1.Stride.COM) Phone: (702) 322-6868 TWX: 910-395-6073 MicroSage Computer Systems Inc. a Division of Stride Micro. Opinions expressed are probably mine.
Re: public key encryption and RSA patent status
Author: Tim Tessin
Date: Thu, 01 Oct 1987 17:16
Date: Thu, 01 Oct 1987 17:16
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In article <683@stride.Stride.COM> (Thomas P. Mitchell) writes:
> Well, I think that the RSA patent holders need to get off their
> duff and get their invention out as a product. A lot of us would
> use it if priced in a reasonable way.
RSA based products are available from RSA Data Security
(415-595-8782) for reasonable prices. They have two products,
Mailsafe and BSAFE. Mailsafe is a
product which sends encrypted electronic mail between PC's. BSAFE
is the coded RSA algorithms in 'C'. My only objection to paying them
lots of money is that if the Government already has rights to the
stuff, I will only pay them a reasonable charge for the implementation,
not for rights to use it.
Tim Tessin - Lawrence Livermore National Laboratory
Phone: (415) 423-4560 / 422-8971
ARPA: tjt@lll-tis.ARPA
UUCP: {ihnp4,dual,sun}!lll-lcc!lll-tis!tjt
Re: public key encryption and RSA patent status
Author: Thomas P. Mitchell
Date: Mon, 05 Oct 1987 18:51
Date: Mon, 05 Oct 1987 18:51
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In article <109@lll-risky.arpa> tjt@lll-risky.arpa (Tim Tessin) writes: >In article <683@stride.Stride.COM> (Thomas P. Mitchell) writes: >> Well, I think that the RSA patent holders need to get off their >> duff and get their invention out as a product. A lot of us would >> use it if priced in a reasonable way. > >RSA based products are available from RSA Data Security >(415-595-8782) for reasonable prices. They have two products, >Mailsafe and BSAFE. Mailsafe is a >product which sends encrypted electronic mail between PC's. BSAFE >is the coded RSA algorithms in 'C'. Thanks Tim; I called and these are available for MS-DOS. They are not presently available for other environments, VAX or NCR machines (or ours Stride). With a pre-payment of royalties ($10,000) one could get the subroutine libraries (*.o files) for BSAFE. Then with the libraries one could set out to build some thing useful. None of which could be exported outside of the US without limiting the bit size of the keys and stripping out DES. >lots of money is that if the Government already has rights to the >stuff, I will only pay them a reasonable charge for the implementation, >not for rights to use it. Amen Perhaps we in this group are barking up the wrong tree. Rather than building a vault we might consider an envelope. Something not too tough but strong enough to keep the postman from reading the mail by holding it up to the light. If we use VAX hours as a standard measure of decryption difficulty I would consider 2-5 VAX hours per K bytes of message a good envelope. Thomas P. Mitchell (mitch@stride1.Stride.COM) Phone: (702) 322-6868 TWX: 910-395-6073 MicroSage Computer Systems Inc. a Division of Stride Micro. Opinions expressed are probably mine.
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