yum and digital signatures

["Todd A. Jacobs" <nospam codegnome org>]

I've looked into the man pages, but I can't find anything related to yum 
and GPG signatures. I know that up2date will verify GPG signatures before 
attempting an install. Can yum be configured to do the same?

-- 
Todd's "Customer Disservice Hall of Shame" currently contains:
    - Charter Communications: Mislead their customers about services,
      and block Internet connectivity.
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