摘要：
按照DES的密钥编排特点，舍弃原始密钥的奇偶校验位，由剩下56位重新换位得到16轮的子密钥，并由每轮密钥使用顺序及未出现的位数，适当设置明文差分和密钥差分，得到5轮DES的差分路径。运用相关密钥差分分析方法分析5轮DES，从而得到9轮DES的相关密钥Boomerang攻击方法，该攻击时间复杂度约为231次加解密运算，数据复杂度为240。
关键词:
DES算法,
相关密钥,
差分路径,
差分分析,
Boomerang攻击
Abstract:
According to Data Encryption Standard(DES) key schedule characteristics and abandoning the original parity bit, this paper receives 16-rounds subkey by transposing from the remaining 56 bit. Based on the order of each subkey and absent bit, it properly sets plaintext difference and key difference, and obtains 5-rounds differential characteristic. Depending on related-key differential method, it analyzes 5-rounds DES and gets 9-rounds DES related key Boomerang attack. The attack time complexity is about 231 times encryption and decrypted operations. The data complexity is 240.
Key words:
Data Encryption Standard(DES),
related key,
differential path,
differential analysis,
Boomerang attack
中图分类号:
杜宝萍, 张文英. 针对9轮DES的相关密钥Boomerang攻击[J]. 计算机工程, 2011, 37(12): 130-132.
DU Bao-Ping, ZHANG Wen-Yang. Related Key Boomerang Attack on 9-Rounds Reduced DES[J]. Computer Engineering, 2011, 37(12): 130-132.