Encryption keys: RSA vs. ElGamal

Werner Koch wk at gnupg.org
Mon Nov 26 13:44:05 CET 2007

On Mon, 26 Nov 2007 10:56, at120 at hushmail.com said:

> There are some pages that explain the algorithms in detail, but I'm 
> not smart enough to evaluate their security and efficiency just by 
> looking at the algorithms.

Go with Elgamal if you want that every OpenPGP impleentaion can cope
with it.  (I usually use RSA because it is a bit faster).

> I know that RSA was published in 1977, and the patent on it ran out 
> in 2000. ElGamal is from 1984, so if there's a patent on it, will 
> it expire/has it expired in 2007?

The DH patent expired in April 1997 which was the reason I started with
GnuPG in the same year.



Die Gedanken sind frei.  Auschnahme regelt ein Bundeschgesetz.

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