Security Evaluation of Multi-dimensional Steganography Model Based on VoIP

Current research on information hiding technology is constantly developing towards the diversification of carriers and the complexity of algorithms. But research on how to effectively combine diverse carriers and steganography algorithms to construct high-security, large-capacity and high-robust parallel algorithms is not sufficient. To deal with this challenge, we present a multi-dimensional information hiding model in the presence of a steganayst and give a formal definition of the model. Furthermore, we define in detail behavioral constraints of each participant in the model, and clarify the capabilities and possible risks of each participant in multi-dimensional information hiding communication. Finally, based on information theory and attacker detection theory, the quantitative evaluation of the security of multidimensional information hiding model is given. All in all, the model clearly describes the principle of multi-dimensional information hiding. At the same time, it can provide a certain theoretical basis for designing a specific multi-dimensional algorithm.