计算机科学 ›› 2022, Vol. 49 ›› Issue (1): 353-358.doi: 10.11896/jsjkx.201000041
• 信息安全 • 上一篇
张赛男, 李千目
ZHANG Sai-nan, LI Qian-mu
摘要: 科技的飞速发展为拍摄和分享图像带来了便利,但随着图像数据的急剧增多,泄露和篡改等安全问题也频频发生,图像加密技术的应用迫在眉睫,尤其是彩色图像的加密急需改进与发展。传统的加密技术主要是针对数据流加密,其效率低、计算量大,存在一定的局限性。基于变换域加密将图像从空域变换到频域进行加密再变换到空域,属于一种有损加密。基于混沌的加密,密钥空间大,实现简单,加密速度快,一般需要采用多个混沌系统来增强加密的安全性。为此,文中设计了一种针对彩色图像RGB三通道的简单安全的空域加密算法,先由 Logistic-Sine-Cosine映射生成较为安全的混沌序列,接着利用混沌序列设计4轮置乱和扩散像素,最后,在一系列安全性分析实验中验证了基于Logistic-Sine-Cosine 映射的彩色图像加密算法的安全性和有效性。
中图分类号:
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