Xiaoyun Wang Xuejia Lai Dengguo Feng Hui Chen Xiuyuan Yu Cryptanalysis of the Hash Functions MD4 and RIPEMD. 1-18 2005 conf/eurocrypt/2005 EUROCRYPT http://dx.doi.org/10.1007/11426639_1 db/conf/eurocrypt/eurocrypt2005.html#WangLFCY05