1994-02-09 - Re: Some stuff about Diffie-Hellman (and more :-)

Header Data

From: rcain@netcom.com (Robert Cain)
To: cypherpunks@toad.com (cypherpunks)
Message Hash: f7df4bb4b6c2c4a7fb7be27d27de2986c85347c9adb69131868f76a5091b1bf5
Message ID: <199402090124.RAA03245@mail.netcom.com>
Reply To: <199402090045.TAA09810@snark>
UTC Datetime: 1994-02-09 01:27:12 UTC
Raw Date: Tue, 8 Feb 94 17:27:12 PST

Raw message

From: rcain@netcom.com (Robert Cain)
Date: Tue, 8 Feb 94 17:27:12 PST
To: cypherpunks@toad.com (cypherpunks)
Subject: Re: Some stuff about Diffie-Hellman (and more :-)
In-Reply-To: <199402090045.TAA09810@snark>
Message-ID: <199402090124.RAA03245@mail.netcom.com>
MIME-Version: 1.0
Content-Type: text/plain


Perry E. Metzger sez:
> 
> You don't care if a listener hears the information on the modulus and
> generator. It doesn't matter. You can broadcast it in the clear.

Ah.  Now I understand what you meant.

> 
> The point I was making was that if you always use the same modulus the
> attacker can expend the effort to attack your modulus just once and
> can then crack individual D-H sessions trivially. If you change each
> time, you can't be attacked in this way.

Good idea.  Think I'll steal it.  I'll just let the little beastie
search for good ones while it isn't doing anything else and isn't
running off its batteries.  :-)


Peace,

Bob

-- 
Bob Cain    rcain@netcom.com   408-354-8021


           "I used to be different.  But now I'm the same."


--------------PGP 1.0 or 2.0 public key available on request.------------------




Thread