Donghoon Chang Sangjin Lee Mridul Nandi Moti Yung Indifferentiable Security Analysis of Popular Hash Functions with Prefix-Free Padding. 283-298 2006 conf/asiacrypt/2006 ASIACRYPT http://dx.doi.org/10.1007/11935230_19 db/conf/asiacrypt/asiacrypt2006.html#ChangLNY06