I programmed up a script to encrypt/sign one of my README files with all
possible combinations of algorithms I support.
I included ElGamal signatures and the .tgz file is just over 1Mb, so I
don't know of anyone else would want to try.
As we have discussed in the past, ElGamal signatures are not secure
with the DSS keys generated by PGP. It is necessary to change
the keygen algorithm so that generators other than 2 are used.
See http://www.bell-labs.com/user/bleichen/bib.html.
Hal Finney
hal(_at_)pgp(_dot_)com
hal(_at_)rain(_dot_)org