On Wed, Sep 25, 2002 at 08:49:47AM -0400, John O Goyo wrote: > Certicom has intellectual property rights relating to safe primes in DH [...]
> + Certicom has intellectual property rights relating to the use of safe primes > + in the DH key-exchange, including US patent 5,933,504 and pending US > + and non-US applications, [...] Can you elaborate? US patent 5,933,504 was filed in 1997, and using safe primes for DH was not new back then. <URL:http://groups.google.com/groups?selm=2odko3%24jsf%40qualcomm.com&output=gplain> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> From: [EMAIL PROTECTED] (Phil Karn) Newsgroups: sci.crypt Subject: Re: Searching for primes Date: 12 Apr 1994 08:05:23 GMT Organization: 843rd Bomb Wing, Burpelson AFB Lines: 18 Distribution: world Message-ID: <2odko3$[EMAIL PROTECTED]> References: <[EMAIL PROTECTED]> <2numd7$[EMAIL PROTECTED]> <[EMAIL PROTECTED]> <[EMAIL PROTECTED]> Reply-To: [EMAIL PROTECTED] NNTP-Posting-Host: unix.ka9q.ampr.org I'm following this discussion with interest because I'm currently generating some prime moduli for use with Diffie-Hellman. (DH is now included in RSAREF, so I'm using it as the basis of an experimental IP security protocol). My understanding of the criteria for a DH modulus p is that both p and (p-1)/2 should be prime, i.e, p should be a "strong" prime. I know that strong primes are no longer thought to be required for RSA key generation, but I understand that they're still a good idea for DH, which depends on the discrete logarithm problem rather than factoring (see LaMacchia's and Odlyzko's 1991 paper on discrete logarithms, URL http://martigny.ai.mit.edu/~bal/field.ps). Is this still the current consensus? Phil <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< -- Bodo Möller <[EMAIL PROTECTED]> PGP http://www.informatik.tu-darmstadt.de/TI/Mitarbeiter/moeller/0x36d2c658.html * TU Darmstadt, Theoretische Informatik, Alexanderstr. 10, D-64283 Darmstadt * Tel. +49-6151-16-6628, Fax +49-6151-16-6036 ______________________________________________________________________ OpenSSL Project http://www.openssl.org Development Mailing List [EMAIL PROTECTED] Automated List Manager [EMAIL PROTECTED]
