面向潜艇卫星隐蔽通信场景下的数字图像隐写技术综述

Overview of Digital Image Steganography for Submarine Satellite Covert Communication

数字图像隐写的本质是利用数字图像的冗余性将秘密信息嵌入到图像中,旨在把秘密信息传送给指定的接收方而不引起第三方的注意,大大提高了信息传输的隐蔽性和安全性,广泛应用于无线通信和有线通信系统。主流的数字图像隐写算法可分为空域隐写和变换域隐写,论文梳理了典型的隐写算法并选取不同存储大小的图片为载体进行隐写性能仿真。针对潜艇卫星通信场景下对于潜艇通信信息发射时间的限制,提出了一种以隐写载体图像存储大小为衡量的场景适应度指标,仿真结果表明在数字图像隐写算法中变换域隐写算法更适合潜艇卫星隐蔽通信的场景。

The essence of digital image steganography is to embed secret information into images by using the redundancy of the digital images,aiming at transmitting secret information to the intended receiver without attracting the attention of the third par⁃ty.The digital image steganography is widely used in wireless and wired communication systems,which greatly improves the con⁃cealment and security of information transmission.Main digital image steganography algorithms can be divided into spatial domain steganography and transform domain steganography.This paper reviews the typical steganography algorithms and selects pictures with different storage sizes as carriers to perform the performance simulation.Due to the limitation of launch time in submarine satel⁃lite communication scenario,a scenario fitness indicator of steganographic carrier's storage size is proposed.The simulation results show that the transform domain steganography algorithm is more suitable for submarine satellite covert communication.