Ivan Damgård Eiichiro Fujisaki A Statistically-Hiding Integer Commitment Scheme Based on Groups with Hidden Order. 125-142 2002 conf/asiacrypt/2002 ASIACRYPT http://link.springer.de/link/service/series/0558/bibs/2501/25010125.htm db/conf/asiacrypt/asiacrypt2002.html#DamgardF02