Toshihiko Matsuo Kaoru Kurosawa On Parallel Hash Functions Based on Block-Ciphers. 67-74 http://search.ieice.org/bin/summary.php?id=e87-a_1_67&category=D&year=2004&lang=E&abst= 2004 87-A IEICE Transactions 1 db/journals/ieicet/ieicet87a.html#MatsuoK04