Lossless embedding: A visually meaningful image encryption algorithm based on hyperchaos and compressive sensing

被引:6
|
作者
Wang, Xing-Yuan [1 ,2 ]
Wang, Xiao-Li [1 ]
Teng, Lin [1 ]
Jiang, Dong-Hua [3 ]
Xian, Yongjin [1 ,4 ]
机构
[1] Dalian Maritime Univ, Sch Informat Sci & Technol, Dalian 116026, Peoples R China
[2] Guangxi Normal Univ, Guangxi Key Lab Multisource Informat Min & Secur, Guilin 541004, Peoples R China
[3] Sun Yat Sen Univ, Sch Comp Sci & Engn, Guangzhou 511400, Peoples R China
[4] Qilu Univ Technol, Shandong Acad Sci, Sch Cyber Secur, Jinan 250353, Peoples R China
基金
中国国家自然科学基金;
关键词
chaotic image encryption; compressive sensing; meaningful cipher image; portable network graphics; image encryption algorithm; CHAOS;
D O I
10.1088/1674-1056/aca149
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A novel visually meaningful image encryption algorithm is proposed based on a hyperchaotic system and compressive sensing (CS), which aims to improve the visual security of steganographic image and decrypted quality. First, a dynamic spiral block scrambling is designed to encrypt the sparse matrix generated by performing discrete wavelet transform (DWT) on the plain image. Then, the encrypted image is compressed and quantified to obtain the noise-like cipher image. Then the cipher image is embedded into the alpha channel of the carrier image in portable network graphics (PNG) format to generate the visually meaningful steganographic image. In our scheme, the hyperchaotic Lorenz system controlled by the hash value of plain image is utilized to construct the scrambling matrix, the measurement matrix and the embedding matrix to achieve higher security. In addition, compared with other existing encryption algorithms, the proposed PNG-based embedding method can blindly extract the cipher image, thus effectively reducing the transmission cost and storage space. Finally, the experimental results indicate that the proposed encryption algorithm has very high visual security.
引用
收藏
页数:14
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