Re: elgamal homomorphy

From: Johansson Goerik (jgoerik_at_msn.se)
Date: 09/01/04 

Date: Wed, 1 Sep 2004 14:46:00 +0200

Hi,

I would say it is only multiplicative homomorph, am I right?

"Tom St Denis" <tomstdenis@iahu.ca> schrieb im Newsbeitrag
news:aNiZc.248$Rge.23@news04.bloor.is.net.cable.rogers.com...
> Johansson Goerik wrote:
>
> > Hi,
> >
> > I have a really beginner question. Is ElGamal a additive or
multiplicative
> > homorphic encryption scheme?
>
> Why not work it out? What are the requirements for it to be additive and
> multiplicative?
>
> But I'll give a hint... (x^y)^z is the same as x^(y*z) ;-)
>
> Tom