中文摘要：

针对分组密码算法AES-128的安全性分析,评估了AES-128算法内部结构对密钥比特的混淆和扩散性,根据算法的密钥编排特点和轮函数结构,利用FPGA测试平台设计了一种AES-128的密钥中比特检测算法。测试结果表明,在立方变元取17~24维时,3轮简化AES-128的输出位容易捕获密钥中比特,但4轮以上AES-128的输出位均无法捕获密钥中比特。

英文摘要：

Focusing on the safety analysis of the AES-128 block cipher,AES-128 algorithm internal structure on key bit confused and diffusivity is evaluated.Based on the key scheme and the round function structure,a key neutral-bit detection algorithm is designed for AES-128 by using FPGA test platform.Simulation results show that the output bits of 3-round AES-128 always have neutral key bits when the cubic variables are fixed in the range of 17 to 24dimensions.However,the neutral key bits for the any output of 4-round AES-128 are not found if the cubic variables are fixed in the range of 17 to 24dimensions.