采用随机算法，增加算法的复杂度，降低穷举攻击的可能性。
It makes use of the algorithm at random, increases the complexity of algorithm, decreases the possibility of guessing attack.
针对DES密钥空间过小而不能抵抗穷举攻击的问题，本文给出了一种基于混沌映射的密钥空间拓展方法，从而构造了一种混沌变形DES算法。
To aim at the problem that the key space of DES is too small to prevent exhaust attacks, an expanding key space method is proposed and a chaotic transformed DES algorithm is constructed.
此外还分析了当对嵌有水印的作品进行穷举搜索攻击和减法攻击时算法的鲁棒性。
Moreover we analyze its robustness when exhaustive search and subtraction attack are inflicted on the watermarked content.
DES作为传统分组密码算法的典型代表，存在密钥空间太小的致命弱点，在穷举密钥攻击下被破译。
As the representative of tradition block encryption algorithm, DES has a deadly weakness that is too small key space to prevent exhaust attacks.
穷举仍然是对分组密码的实用的攻击主角。
The exhaustion still was to the block cipher practical attacklead.
穷举仍然是对分组密码的实用的攻击主角。
The exhaustion still was to the block cipher practical attacklead.
应用推荐