单向性策略与AES密钥生成算法的改进

One-way property strategy and improvement of key generation algorithm of Rijndael

介绍了Mars和AES最终算法Rijndael的密钥生成算法。通过与DES比较,分析了新一代分组密码的密钥生成算法的设计思路。通过研究AES在密钥设计方面存在的不足,提出了一种新的设计策略,并应用该策略对AES的密钥生成算法进行了具体的改进,分析表明这种改进既可以提高原算法安全性,又不牺牲其效率。

The key generation algorithm of Rijndael and Mars was introduced.By comparison with Data Encryption Standard(DES),the concept to design new key generation algorithm of block ciphers was analyzed.The weaknesses of the key generation design of Rijndael were investigated,and a new designing strategy was developed,which can be used to improve the key generation algorithm.Analysis shows that such improvement can enhance the safety of the original algorithm without reducing its efficiency.