People have been thinking about this sort of attack since at least 2002 http://www.iacr.org/cryptodb/data/paper.php?pubkey=3091 http://www.iacr.org/cryptodb/dat

People have been thinking about this sort of attack since at least 2002 http://www.iacr.org/cryptodb/data/paper.php?pubkey=3091 http://www.iacr.org/cryptodb/data/paper.php?pubkey=3091