gpgv 1.4.5-3ubuntu2 (amd64 binary) in ubuntu feisty

 GnuPG is GNU's tool for secure communication and data storage.
 .
 gpgv is a stripped-down version of gnupg which is only able to check
 signatures. It is smaller than the full-blown gnupg and uses a
 different (and simpler) way to check that the public keys used to
 make the signature are trustworthy.