TY - JOUR
T1 - Related-key attacks on DDP based ciphers
T2 - CIKS-128 and CIKS-128H
AU - Ko, Youngdai
AU - Lee, Changhoon
AU - Hong, Seokhie
AU - Sung, Jaechul
AU - Lee, Sangjin
N1 - Funding Information:
★ This work was supported by the Ministry of Information & Communications, Korea, under the Information Technology Research Center (ITRC) Support Program.
PY - 2004
Y1 - 2004
N2 - CIKS-128 and CIKS-128H are 128-bit block ciphers with a 256-bit key sizes based on data-dependent operations, respectively. They are also fast hardware-oriented ciphers and improvements of block cipher CIKS-1 introduced in [14]. This paper presents related-key differential attacks on full-round CIKS-128 and CIKS-128H. In result, using full-round related-key differential characteristics with probability 2-36 and 2-35.4, these attacks can recover the partial subkey bits for CIKS-128 and CIKS-128H with about 240 plaintexts, respectively. These works suggests that the greatest possible care has to be taken when proposing improvements of the existing block ciphers.
AB - CIKS-128 and CIKS-128H are 128-bit block ciphers with a 256-bit key sizes based on data-dependent operations, respectively. They are also fast hardware-oriented ciphers and improvements of block cipher CIKS-1 introduced in [14]. This paper presents related-key differential attacks on full-round CIKS-128 and CIKS-128H. In result, using full-round related-key differential characteristics with probability 2-36 and 2-35.4, these attacks can recover the partial subkey bits for CIKS-128 and CIKS-128H with about 240 plaintexts, respectively. These works suggests that the greatest possible care has to be taken when proposing improvements of the existing block ciphers.
KW - Block Cipher
KW - CIKS-128
KW - CIKS-128H
KW - Data-Dependent Operation
KW - Related-Key Differential Attack
UR - http://www.scopus.com/inward/record.url?scp=33646193691&partnerID=8YFLogxK
U2 - 10.1007/978-3-540-30556-9_16
DO - 10.1007/978-3-540-30556-9_16
M3 - Article
AN - SCOPUS:33646193691
SN - 0302-9743
VL - 3348
SP - 191
EP - 205
JO - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
JF - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ER -