Security Transmission Technology Of Large-capacity Data

At present, the size of network rapidly expanding, the rapid development of network brings many security risks of data transmission. The successive information leakage and cyber crime make the security issues more prominent. In the information age, the data is the base of carrying information, the exchange of information data transmission can not be separated from it. Thus the security of data transmission has become a very serious problem and can't be avoided, it requires the stronger security measures to protect confidential data, which is not be stolen or tampered during the process of transmission by illegal attackers.In all aspects of today's society, information technology plays an important role, information hiding technology is an important part of the field of information security, and it is also the research hotspots. This paper proposed a better scheme based on the study of information hiding technology, and improve the security of data transmission.The main results are as follows:1. RSA encryption algorithm used to encrypt the image scrambling, the experiment proved that the algorithm can against attacks effectively and improve information security.2. Proposed the information hiding program which based on wavelet. Take advantage of the wavelet analysis, and the image of the masking effect of Human visual system. The algorithm combine the human visual characteristics and the own characteristics of secret information, adjustment the high frequency sub-band coefficients to achieve the information adaptively.3. Study the characteristics of JPEG2000, the wavelet transform combine the advantages of the hidden images, proposed information hiding algorithm based on JPEG2000. Multi-resolution wavelet decomposition for the carrier image, then select the important wavelet coefficients according to the masking properties of human visual system, and the secret information embedded in different frequency domains of wavelet coefficients. This algorithm improves the capacity of information hiding, and takes into account the balance of the robustness and the capacity.