[ Thanks to Thomas
Chung for this link. ]
“GnuPG (GNU Privacy Guard) is a complete and free replacement
for PGP. Because it does not use the patented IDEA algorithm, it
can be used without any restrictions. GnuPG is a RFC2440 (OpenPGP)
compliant application.“After building your custom RPM package, it’s a good idea to
sign the package with your own GPG Key to make sure the package is
authentic…”