New LSB-based colour image steganography method to enhance the efficiency in payload capacity, security and integrity check

Abstract

Steganography is the technique for hiding information within a carrier file so that it is imperceptible for unauthorized parties. In this study, it is intended to combine many techniques to gather a new method for colour image steganography to obtain enhanced efficiency, attain increased payload capacity, posses integrity check and security with cryptography at the same time. Proposed work supports many different formats as payload. In the proposed method, the codeword is firstly formed with secret data and its CRC-32 checksum, then the codeword is compressed by Gzip just before encrypting it by AES, and it is finally added to encrypted header information for further process and then embedded into the cover image. Embedding the encrypted data and header information process utilizes Fisher-Yates Shuffle algorithm for selecting next pixel location. To hide one byte, different LSB (least significant bits) of all colour channels of the selected pixel is exploited. In order to evaluate the proposed method, comparative performance tests are carried out against different spatial image steganographic techniques using some of the well-known image quality metrics. For security analysis, histogram, enhanced LSB and Chi-square analyses are carried out. The results indicate that with the proposed method has an improved payload capacity, security and integrity check for common problems of simple LSB method. Moreover, it has been shown that the proposed method increases the visual quality of the stego image when compared to other studied methods, and makes the secret message difficult to be discovered.

Extended Statistical Analysis on Multimedia Concealed Data Detections

“…Main limitation of this work is stego analysis part has missed. It extends to that some other methods also using to enhance the capacity of payload embedding into images like LSB method as well as attacks on stegaanalysis [12][13].…”

Identify Criminal Records in Social Media using Sentiment Analysis

“…But repeated testing has shown that such substitution can carried out till 5 th least significant bit at maximum. After 5 th bit substitution, secret message starts revealing its existence which is against the objective of steganography [56]. An experiment has shown that in case of 24 bits' true color image, capacity of embedding secret image is 1/8th of the total size.…”

Crypto-Steganographic LSB-based System for AES-Encrypted Data

“…Digital watermarking is the process of embedding information into digital multimedia content such that the information (the watermark) can later be extracted or detected for a variety of purposes including copy prevention and control. Basically, it is advised to use the LSB approach [5] [7], which allows for a replacement that is not generally visible to the human eye; i.e. of less significance.…”

“…A steganography task is to hide a certain message in another container file, so that the presence of the hidden message cannot be seen [2,3]. As containers, digital images, audio and video files are commonly used [2,5,7]. As a result of embedding, steganography overcome the limitation of cryptography by hiding the fact that a transmission through the communication channel is taking place.…”

“…An overview of the existing methods of solving the problem [2,3,5], showed that the most promising in terms of information capacity are containers in the form of image files in BMP format. Methods that use image files are the most advantageous and promising, since they practically do not limit the amount of data transferred, it all depends on the container selected.…”