A novel magic LSB substitution method (M-LSB-SM) using multi-level encryption and achromatic component of an image

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• 作者：Khan Muhammad ; Muhammad Sajjad ; Irfan Mehmood…
• 关键词：Cryptography ; Information security ; LSB ; Multi ; level encryption ; Steganography ; Secret key
• 刊名：Multimedia Tools and Applications
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：75
• 期：22
• 页码：14867-14893
• 全文大小：5,115 KB
• 刊物类别：Computer Science
• 刊物主题：Multimedia Information Systems
  Computer Communication Networks
  Data Structures, Cryptology and Information Theory
  Special Purpose and Application-Based Systems
  
• 出版者：Springer Netherlands
• ISSN：1573-7721
• 卷排序：75

文摘

Image Steganography is a thriving research area of information security where secret data is embedded in images to hide its existence while getting the minimum possible statistical detectability. This paper proposes a novel magic least significant bit substitution method (M-LSB-SM) for RGB images. The proposed method is based on the achromatic component (I-plane) of the hue-saturation-intensity (HSI) color model and multi-level encryption (MLE) in the spatial domain. The input image is transposed and converted into an HSI color space. The I-plane is divided into four sub-images of equal size, rotating each sub-image with a different angle using a secret key. The secret information is divided into four blocks, which are then encrypted using an MLE algorithm (MLEA). Each sub-block of the message is embedded into one of the rotated sub-images based on a specific pattern using magic LSB substitution. Experimental results validate that the proposed method not only enhances the visual quality of stego images but also provides good imperceptibility and multiple security levels as compared to several existing prominent methods.