摘要
超混沌系统图像加密算法HYPER_HIE由于采用初等变换和异或运算作为加密措施,因此很难抵抗各种攻击。针对该算法的3个步骤,即密钥生成、像素置乱、图像扩散与混乱,选择全零矩阵、行相同矩阵和列相同矩阵这3种明文矩阵,在未知加密密钥的前提下对该算法进行选择明文攻击。通过一个实例表明,该攻击方法仅以很小的计算代价破译了密文。
Hyper-chaotic system image encryption algorithm HYPER_HIE uses elementary transforlnation and exjunction to encrypt, so it is difficult to resist various attacks. Aiming at three steps of HYPER_HIE including key generation, pixel scrambling, image diffusion and confusion, this paper chooses three kinds of plaintext matrixes to do chosen plaintext attack without knowing eneryption key. An instance shows that the attack method can decode ciphenext with low computing costs.
出处
《计算机工程》
CAS
CSCD
2012年第17期148-151,共4页
Computer Engineering
基金
湖南省教育厅科研基金资助项目(10C0579
09C296)
衡阳市科技计划基金资助项目(2010KJ31
2010KG58
2011KG68)
湖南工学院重点科研基金资助项目(HY10001)
关键词
超混沌系统
图像加密算法
选择明文攻击
明文矩阵
矩阵变换
密文矩阵
hyper-chaotic system
image encryption algorithm
chosen plaintext attack
plaintext matrix
matrix transformation
cipher matrix
