Aaram Yun Soo Hak Sung Sangwoo Park Donghoon Chang Seokhie Hong Hong-Su Cho Finding Collision on 45-Step HAS-160. 146-155 2005 conf/icisc/2005 ICISC http://dx.doi.org/10.1007/11734727_13 db/conf/icisc/icisc2005.html#YunSPCHC05