Please cite our paper if you want to use FastHASH algorithm:
Hongyi Xin, Donghyuk Lee, Farhad Hormozdiari, Samihan Yedkar, Onur Mutlu, and Can Alkan,
"Accelerating Read Mapping with
FastHASH"
BMC Genomics, 14(Suppl 1):S13, 21 January 2013. PDF article
also appears in Proceedings of the 11th Asia Pacific Bioinformatics Conference (APBC), Vancouver, BC, Canada, January 2013. Slides (pptx)