Open AccessSecurity of Khudra Against Meet‐in‐the‐Middle‐Type Cryptanalysis
Author(s) -
ZHENG Yafei,
WU Wenling
Publication year - 2019
Publication title -
chinese journal of electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.267
H-Index - 25
eISSN - 2075-5597
pISSN - 1022-4653
DOI - 10.1049/cje.2019.03.008
Subject(s) - cryptanalysis , computer security , type (biology) , boomerang attack , linear cryptanalysis , computer science , geology , cryptography , paleontology
Khudra is a lightweight block cipher proposed in SPACE 2014. The cipher is designed for Field programmable gate array (FPGA) based platforms. In this paper, we introduce the first biclique attack on full Khudra in the single key setting, with time complexity of 2 78:3 encryptions. The time complexity can be further reduced if the post‐whitening key is omitted. Furthermore, based on the bicliques constructed, Meet‐in‐the‐middle(MITM) attack is applied to 15‐round Khudra, and the best result of Khudra in terms of attacked rounds against MITM attack is achieved.