Errors

valid_signature
Old SIGNATURE detected. Please inform the module author to regenerate SIGNATURE using Module::Signature version 0.82 or newer.
gpg: Signature made Wed 04 Jun 2014 03:08:10 PM JST
gpg:                using RSA key B08303CF8E34293B
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==