1results about How to "Improve link utilization" patented technology

This invention relates to the field of network security technology and proposes a method and system for secure transmission in Virtual Private Networks (VPNs). The method includes: dynamically fragmenting the transmitted data of the VPN into unequal lengths to obtain fragmented data sequences; performing multi-path parallel routing optimization on the fragmented data sequences based on multi-dimensional traffic characteristics to obtain preferred transmission paths; quantifying the risks of the preferred transmission paths and performing hierarchical differentiated encryption on the fragmented data sequences to obtain encrypted data fragments; performing cross-link segmented logical isolation on the preferred transmission paths based on the encrypted data fragments to obtain virtual isolated transmission channels, and performing node authentication to obtain trusted isolated transmission channels; performing segmented transmission on the encrypted data fragments based on the trusted isolated transmission channels to obtain receiving-end data fragments; and verifying and reassembling the receiving-end data fragments to obtain restored data, thereby achieving secure transmission. This invention can improve the security of VPN transmission.