Welcome to the resource topic for 2010/593
Title:
Differential Attack on Five Rounds of the SC2000 Block Cipher
Authors: Jiqiang Lu
Abstract:The SC2000 block cipher has a 128-bit block size and a user key of 128, 192 or 256 bits, which employs a total of 6.5 rounds if a 128-bit user key is used. It is a CRYPTREC recommended e-government cipher. In this paper we describe two 4.75-round differential characteristics with probability 2^{-126} of SC2000 and seventy-six 4.75-round differential characteristics with probability 2^{-127}. Finally, we present a differential cryptanalysis attack on a 5-round reduced version of SC2000 when used with a 128-bit key; the attack requires 2^{125.68} chosen plaintexts and has a time complexity of 2^{125.75} 5-round SC2000 encryptions. It suggests for the first time that the safety margin of SC2000 with a 128-bit key decreases below one and a half rounds.
ePrint: https://eprint.iacr.org/2010/593
See all topics related to this paper.
Feel free to post resources that are related to this paper below.
Example resources include: implementations, explanation materials, talks, slides, links to previous discussions on other websites.
For more information, see the rules for Resource Topics .