Secure Image Steganography Based on Step-varying Quantization
基于变步长量化的安全图像隐写

Image steganography transfers message secretly by embedding the message into a cover image to implement covert communication.We presented an image steganographic algorithm called VSQS.A secret key dependent Gaussian sequence was generated and then rounded,which is used for the step-varying quantization of the pseudo-random permuted image pixels.Depending on the relationship between the quantized pixels and the secret message,the image pixels were modified to embed the message.Furthermore,an extension of thi...