Write Algorithm, Based On More Than Transform The Lsb Hidden

Information hiding has become a hot interest area recently in the research of information security .It is to embed private messages in seemingly innocuous cover messages making use of the redundancy information. Steganography and digital watermarking are two main sub-disciplines of information hiding. Steganography is the art and science of communicating in a way which hides the existence of the communication.This thesis is focused on steganography algorithm based on two-dimensional Arnold transform and modified LSB embedding scheme.The main content of this thesis is summarized as follows:(1) A modified LSB embedding schemes are proposed.Through analyzing thoroughly the switch rule of pair of values caused by traditional LSB replacement scheme and two steganglysis algorithms which can reliably detect the message embedded by traditional LSB replacement(RS method and math method).(2) Based on the study of image scrambling technique,the periodicity and the evaluation criterion of scrambling technique's performance,we point out that the security of steganograohy can be improved by scrambling cover-image.(3) The steganography system based on modified transform and modified LSB embedding is constructed.