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 Tue 11 Feb 2014 05:38:38 AM JST
gpg:                using RSA key 5F1BF8166B9696F4
gpg: Can't check signature: No public key
==> BAD/TAMPERED signature detected! <==