Abstract
The rapid increase in the usage of multimedia content and transmission over the internet demands data securing techniques. In this work, a data encryption technique using a three-dimensional chaotic map and highly nonlinear substitution boxes for the encryption of secret images, followed by a data hiding scheme based on Lah transformation i-e the secret image is first encrypted and then hide in the cover image. For data hiding, integer’s polynomial sequence is generated using addition and multiplication in coefficient form by evaluating pixels of images, secret bits of Lah transformed encrypted image are embedded in the LhTs coefficient of cover image partitioned into the cluster of four bits. To ensure minimum distortion coefficient adjustment is done before the embedding process. To obtain the stego image inverse Lah transformation is applied after the embedding process. The security analysis of the proposed dual layer data security scheme is performed, the result shows that the proposed system bearing strong immunity against various cryptographic attacks.
Highlights
During the communication of digital content over a communication channel, the data is subjected to various security threats
For homomorphically encrypted images a data hiding scheme is presented in [15] in which part of the secret data can be retrieved into an encrypted domain and the remainder can be extracted after picture
SIMULATION RESULTS AND SECURITY ANALYSIS Lena, pepper, baboon, airplane, girl images of size 256 × 256 are utilized in the experimental setup
Summary
During the communication of digital content over a communication channel, the data is subjected to various security threats. Based on the adaptive encoding method, a reversible data hiding scheme for image encryption is suggested [18]. The analysis of embedded encrypted block MSB layers first generates auxiliary information and performs the adaptive block encoding based on the MSB and Huffman data hiding code. This helps reversed code words, data support, and extra data to be replaced by reverse Huffman layers to blend into MSB layers of encrypted images. The principal idea of this manuscript is to propose a dual information hiding scheme which hide digital content and provides confidentiality to secret contents which is to be hided in cover medium. The remaining of the article is organized as: section describes the basic concepts utilized in the projected system, Section three is devoted to the proposed encryption and data hiding structure Section four discuss the simulations and results while section five is dedicated to concluding the article
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