A Robust Audio Steganographic Scheme in Time Domain (RASSTD)

Abstract

Digital Steganograpic techniques hide secret messages in a cover media (mostly image, audio or video) in an imperceptible manner which cannot be detected by unintended recipient. In addition to imperceptibility, security, capacity and robustness are the other major challenges for an effective steganographic technique. This article proposes a novel steganographic method, considering maximum secrecy, high capacity and robustness against certain attacks. The method utilizes uncompressed digital audio signals as the carrier and hides different types of digital payloads (image/text/audio) in the time domain. In the process of embedding multiple payload bits (either 2 bits or 3 bits) are embedded in each of the sample values at pseudo-random positions. The pseudo-random positions are generated using a logical expression which is devised as a function of both the cover and the payload involved to make the algorithm inherently robust against potential collusion attacks. Various objective and subjective metrics have been used to measure the performance of the proposed technique. Also test results have been presented to analyse its robustness against white noise and collusion attack.

An Efficient Method to Audio Steganography based on Modification of Least Significant Bit Technique using Random Keys

“…The SNR is calculated by formula: calculate the SNR (signal to noise ratio) value and the PSNR (peak signal to ratio) value between cover audio and stego. The Results shown in tables [1,2] for embedding text, audio, gray image and color image. The SNR is calculated by formula:…”

“…Audio steganography is the method of hiding a secret message in digital audio file. We use audio rather than image because the human Auditory system (HAS) is more extensive than human visual system (HVS), [2,7].…”

“…Anyone can use steganography for private communications. Audio Steganography techniques can be applied for covert communications using unclassified channels without additional demand for bandwidth or simply for storing data, [2]. Audio steganography is the method of hiding a secret message in digital audio file.…”

A novel hybrid audio steganography for imperceptible data hiding

“…al. [9] presents a multiple pay load bit embedding in the samples of audio signal which are selected by a random process as a function of cover and payload. LSB based audio steganography based on text compression by M Baritha begum et.…”

“…In one of the previous work proposed by the author [9] hides the mUltiple payload bits in each of the sample value selected at random positions to improve the payload. This paper proposes novel audio steganography that extends the idea with increased security level and robustness to the secret data embeds in the audio signal.…”