Hong-Su Cho Sangwoo Park Soo Hak Sung Aaram Yun Collision Search Attack for 53-Step HAS-160. 286-295 2006 conf/icisc/2006 ICISC http://dx.doi.org/10.1007/11927587_24 db/conf/icisc/icisc2006.html#ChoPSY06