Christophe Petit Kristin Lauter Jean-Jacques Quisquater Full Cryptanalysis of LPS and Morgenstern Hash Functions. 263-277 2008 SCN http://dx.doi.org/10.1007/978-3-540-85855-3_18 conf/scn/2008 db/conf/scn/scn2008.html#PetitLQ08