TY - GEN
T1 - A New Higher Order Differential of LCB
AU - Shibayama, Naoki
AU - Igarashi, Yasutaka
N1 - Publisher Copyright:
© 2024, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2024
Y1 - 2024
N2 - LCB is a 32-bit block cipher proposed by Roy et al. in 2021. The designers evaluated its security against differential cryptanalysis, linear cryptanalysis, and so on. On the other hand, it has not been reported the security of LCB against higher order differential cryptanalysis, which is one of the algebraic attacks. In this paper, we applied higher order differential cryptanalysis to LCB. Consequently, we found a new full-round higher order differential characteristic of LCB using 1-st order differential. Exploiting this characteristic, it is possible to apply the distinguishing attack to full-round LCB with 2 chosen plaintexts. Then, we also show that LCB can be broken under the condition for known plaintext attacks. Furthermore, we tried to improve the round function of LCB to analysis this vulnerability.
AB - LCB is a 32-bit block cipher proposed by Roy et al. in 2021. The designers evaluated its security against differential cryptanalysis, linear cryptanalysis, and so on. On the other hand, it has not been reported the security of LCB against higher order differential cryptanalysis, which is one of the algebraic attacks. In this paper, we applied higher order differential cryptanalysis to LCB. Consequently, we found a new full-round higher order differential characteristic of LCB using 1-st order differential. Exploiting this characteristic, it is possible to apply the distinguishing attack to full-round LCB with 2 chosen plaintexts. Then, we also show that LCB can be broken under the condition for known plaintext attacks. Furthermore, we tried to improve the round function of LCB to analysis this vulnerability.
KW - Block cipher
KW - Cryptanalysis
KW - Higher order differential
KW - LCB
KW - Saturation property
UR - http://www.scopus.com/inward/record.url?scp=85182589996&partnerID=8YFLogxK
U2 - 10.1007/978-981-99-8024-6_1
DO - 10.1007/978-981-99-8024-6_1
M3 - Conference contribution
AN - SCOPUS:85182589996
SN - 9789819980239
T3 - Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
SP - 3
EP - 15
BT - Information Security Applications - 24th International Conference, WISA 2023, Jeju Island, South Korea, August 23–25, 2023, Revised Selected Papers
A2 - Kim, Howon
A2 - Youn, Jonghee
PB - Springer Science and Business Media Deutschland GmbH
T2 - 24th International Conference on Information Security Applications, WISA 2023
Y2 - 23 August 2023 through 25 August 2023
ER -