Based on interphone s communication protocols as well as synthesizing interface and technological parameter related to interphones and personal computer,it uses Visual C++ language to program a writing-frequency software that is suitable for a certain type of interphone.

An adaptive audio steganography of integer discrete wavelet packet domain based on auditory model is proposed.

Video steganography and steganalysis are investigated.

Aiming at the shortcoming that spread spectrum steganography breaks image local stationarity,this paper presents a detection algorithm for spread spectrum steganography based on wavelet singularity analysis.

Then it presents the encapsulation format of the data that the Communication Groupware deals with,which is the communication protocol of high-frequency readers of a certain company.