Re: pubkeys for p and g

2003-06-30 Thread martin f krafft
also sprach Arnold G. Reinhold <[EMAIL PROTECTED]> [2003.06.29.0424 +0200]: > >I am not sure I understand. How does this relate to my question? > > > >Where does the other factor come from? > > I got the impression, and maybe I misunderstood, that you were > viewing a product of two primes aA, wh

Re: pubkeys for p and g

2003-06-28 Thread martin f krafft
also sprach Nomen Nescio <[EMAIL PROTECTED]> [2003.06.27.2230 +0200]: > Do you have a reference to what exactly Check Point says about this? > Maybe you are misunderstanding or misinterpreting them. If you could > quote it here verbatim (or provide a link if it is online) we might be > able to und

Re: pubkeys for p and g

2003-06-27 Thread Nomen Nescio
martin f krafft writes: > My point was that some commercial vendors (Check Point and others) > claim, that if two partners want to perform a DH key exchange, they > may use their two public keys for g and p. This, in effect, would > mean that g and p were not globally known, but that the public key

Re: pubkeys for p and g

2003-06-27 Thread Peter Fairbrother
martin f krafft wrote: > also sprach Peter Fairbrother <[EMAIL PROTECTED]> [2003.06.27.1903 +0200]: >> Can you give me a ref to where they say that? I'd like to know >> exactly what they are claiming. > > this will have to wait a couple of days. > >> Perhaps they are encrypting the DH secrets wi

Re: pubkeys for p and g

2003-06-27 Thread Peter Fairbrother
martin f krafft wrote: > My point was that some commercial vendors (Check Point and others) > claim, that if two partners want to perform a DH key exchange, they > may use their two public keys for g and p. This, in effect, would > mean that g and p were not globally known, but that the public ke

Re: pubkeys for p and g

2003-06-26 Thread martin f krafft
> I'm not certain I understand your questions, but here are some > answers (I think). To clear this up: I am well aware how DH works, and what the mathematical properties of p and g are and have to be. My point was that some commercial vendors (Check Point and others) claim, that if two partners

Re: pubkeys for p and g

2003-06-26 Thread Anton Stiglic
I'm not certain I understand your questions, but here are some answers (I think). In the DH protocol you have what we call public parameters, p and g. p is a large prime integer, which defines a group Z*p, g is a generator which defines a subgroup in Z*p. You can use fix values for p an g. Now, par