Data encryption method and system for SD-WAN

The invention relates to a data encryption method and system for an SD-WAN, and belongs to the technical field of digital information transmission, and the method comprises the steps: collecting traffic data of a plurality of accesses in a preset time period; calculating the sensitive degree of the traffic data of each access; converting the traffic data of each piece of access into a three-dimensional data point in a three-dimensional coordinate system, and randomly selecting one three-dimensional data point as an initial data point; calculating the local offset degree of the initial data point in the initial neighborhood value; dividing the three-dimensional data points into multiple layers according to the local offset degree, and performing data offset on each three-dimensional data point in each layer to obtain encrypted data; according to the method, the encrypted data cannot present data features in a periodic range, and the data with similar sensitive degree features in a certain range is adjusted and