Xiaoyun Wang (born 1966) is a researcher and professor in the Department of Mathematics and System Science, Shandong University, Shandong, China. At the rump session of CRYPTO 2004, she and co-authors demonstrated collision attacks against MD5, SHA-0 and other related hash functions. (A collision occurs when two distinct messages result in the same hash function output). They received a standing ovation for their work. Wikipedia
The definitive Wikipedia entry for Xiaoyun Wang. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Xiaoyun_Wang