Youngdai Ko Changhoon Lee Seokhie Hong Jaechul Sung Sangjin Lee Related-Key Attacks on DDP Based Ciphers: CIKS-128 and CIKS-128H. 191-205 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3348&spage=191 2004 conf/indocrypt/2004 INDOCRYPT db/conf/indocrypt/indocrypt2004.html#KoLHSL04