Errors

valid_signature
gpgkeys: key 5F1BF8166B9696F4 not found on keyserver gpg: Signature made Thu Jun 13 03:58:27 2013 JST using RSA key ID 6B9696F4 gpg: requesting key 6B9696F4 from hkp server pool.sks-keyservers.net gpg: no valid OpenPGP data found. gpg: Can't check signature: public key not found ==> BAD/TAMPERED signature detected! <==