On May 2, 2009, at 6:25 AM, Simon Ruderich wrote:
I would like to use a different hash than SHA-1. I tried setting personal-digest-preferences SHA256 in my gpg.conf but it didn't work. What hash can I use with my key (default DSA/Elgamel key) and how?
The short answer is that you can only use a 160-bit hash with your default DSA key. That means SHA-1 or RIPEMD/160. There is a feature you can enable (--enable-dsa2) that will allow you to use a bigger hash -- but you can still only use 160 bits worth of it. So if you use SHA-256, you're actually only taking 160 bits worth of it and discarding the rest.
To truly use all of a larger hash, you need to either use a RSA key or a large (not default) DSA key (i.e. generated with --enable-dsa2 switched on, and a larger size than 1024 bits selected).
David _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
