Implementation of Covert Communication Based on Steganography

Improved adaptive partial-matching steganography for Voice over IP

“…More recently, a lot of research efforts turn to improving steganographic transparency and security (undetectability) of LSB approaches. For example, trading the embedding capacity for the steganographic transparency by introducing LSB matching steganography [12]; improving the embedding security via dynamically choosing multiple bits based on the VoIP vector value, dynamically changing embedding intervals and modifying neighbor bits to offset the distortion [13]; enhancing the security and transparency by choosing lower embedding bit rates in the flat blocks and higher embedding bit rates in the sharp blocks [14] and adopting the least-significant-digits rather than independent LSBs to conceal secret messages [15].…”

A Secure Data Communication System Using Cryptogaphy And Steganography

“…In [10] a secret data communication system was presented, it employs RSA with asymmetric keys and AES with symmetric key to encrypt the data, after that the encrypted data is embedded into the cover image using smart LSB pixel mapping and data rearrangement method. In [11] and [12] two secure communication systems were proposed to be used for voice over IP (VOIP) applications. LSB based steganography was employed to hide the information over an audio cover signal.…”

Digital logic based encoding strategies for steganography on voice-over-IP

“…However, we argue that the transparency of the given steganography method can be improved by proper encoding. In this paper, we proposed three encoding strategies used to enhance the Huang et al [9] first introduced LSB matching method to enhance transparency. In their method, a pseudo random sequence (PRS) is used to guide embedding.…”

“…Here, DF = 0 indicates that strategy 1 is adopted, and DF = 1 indicates that strategy 2 is adopted. We compare our strategies with the traditional LSBs method and the LSB matching method in [9]. We employ m sequences as the PRSs used in our strategy 1 and the LSB matching method.…”

“…Owing to its advantages of low cost and flexible advanced digital features, VoIP has become a popular alternative to public-switched telephone network (PSTN), and extensive research on it has been conducted [5]. In recent years, many researchers have carried out useful research on steganography over VoIP [6][7][8][9][10][11][12]. Most of them [6][7][8] mainly focus on the embedding methods or implementations of steganography on VoIP.…”