Jun Yajima Terutoshi Iwasaki Yusuke Naito Yu Sasaki Takeshi Shimoyama Thomas Peyrin Noboru Kunihiro Kazuo Ohta A Strict Evaluation on the Number of Conditions for SHA-1 Collision Search. 87-95 2009 92-A IEICE Transactions 1 http://search.ieice.org/bin/summary.php?id=e92-a_1_87&category=A&year=2009&lang=E&abst= db/journals/ieicet/ieicet92a.html#YajimaINSSPKO09