Date: Wed, 30 Jul 1997 19:03:58 +0400 (MSD) From: Maxim Bolotin <max@rnd.runnet.ru> To: dkelly@HiWAAY.net Cc: freebsd-security@FreeBSD.ORG Subject: Re: Commercial ssh and ssl (was Re: securelevel...) Message-ID: <Pine.BSF.3.95q.970730183734.16400A-100000@altos.rnd.runnet.ru> In-Reply-To: <199707300301.WAA09906@nexgen.hiwaay.net>
next in thread | previous in thread | raw e-mail | index | archive | help
> Vincent Poy wrote:
> I forgot, when does the relavent RSA patent expire? Maybe we can wait until
> then. :-)
"Practical UNIX and Internet Security", second edition, April 1996.
p.563
This restriction is result of the fact that the use of public-key
cryptography in the United States will be covered by patents until the
year 1997 (in the case of the Diffie-Hallman and Hallman-Merkle patents)
or the year 2000(in the case of the RSA patent).
p.159
The RSA algorithm is covered by U.S. Patent 4,405,829 ("Cryptographic
Communications System and Method"), which was filed for on December 14,
1977; issued on September 20, 1983; and expires on September 20, 2000.
Because a description of the algorithm was published before the patent
application was filed, RSA can be used without royalty everywhere in the
world except the United States (international patent laws have different
coverage of prior disclosure and patent applicability).
p.192
Table 6-4. The Public Key Cryptography Patents.
Patent # Title Covers Invention Date expires
4200770 Cryp. Apparatus and Meth. Diffie-Hellman April 29, 1997
Key exchange
4218582 Public Key Cryp. Knapsack, and August 19, 1997
Apparatus and Method possibly all of
public key crypt.
4424414 Exponentiation crypt. and January 3, 2001
Apparatus and Method
4405829 Crypt. communications RSA encryption September 20, 2000
System and Method
Maxim.
-
Rostov State University Computer Center
Rostov-on-Don, +7 (8632) 285794 or 357476
Russia, RUNNet, MAB1-RIPE max@runnet.ru
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.BSF.3.95q.970730183734.16400A-100000>