Research on the security transmission framework based on wavelet analysis

The study on human visual system points out that modification on wavelet high frequency subband coefficients is hard to be perceived by human eyes. Network security technology is benefit to information security transmission. The paper put forward a security transmission framework that utilize discrete wavelet transform to transmit secrete data (such as password, etc) carried by common picture in application layer and utilize VPN gateway based on the IPSec tunnel protocol to encapsulate IP packet in network layer. It provides a kind of new choice for end-to-end security transmission.