Sanghoon Song Taekyoung Kwon Ki Song Yoon Practical Security Improvement of PKCS#5. 869-876 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2869&spage=869 2003 conf/iscis/2003 ISCIS db/conf/iscis/iscis2003.html#SongKY03