Stopping multiple votes by IP

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi everyone. I need to ensure that only one 'vote' per 'article' can be cast by each visitor and was hoping you might share any opinions you have on my solution: IP's seem the way to go so I thought the simplest and most secure method would be this: Have a MySQL table with 2 fields: IP and ARTICLE_ID Check the $REMOTE_ADDR against this table WHERE IP = $REMOTE_ADDR AND $articl_id = $ARTICLE_ID IF there is no match, record the vote and insert their IP and the article id IF /is/ a match, decline. Anyone see any inherent problems with that? Many thanks! - -- Nick Wilson // www.explodingnet.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) iD8DBQE8/ejLHpvrrTa6L5oRAjf5AJ98ew6rICv4DUAqACXXu1Ru7TxYBQCfbKxn yzTmfMgihXvX65sY/bCMMDA= =zRNV -----END PGP SIGNATURE-----