The invention discloses a differentiated
privacy protection method and
system based on social propagation force
perception, and the method comprises the following steps: S1, constructing a
social graph, and carrying out the preprocessing and
community division of the graph, and obtaining
community tags; s2, calculating the propagation degree, the influence and the propagation weight of the node based on the
community label; s3, grouping the nodes according to the comprehensive risk
score, and presetting an initial
differential privacy parameter for each group; s4, based on a grouping result, adaptively adjusting the
noise intensity of each group through a
water level type strategy, and carrying out differential training; and S5, after training is completed, constructing a strong
black box node member to infer attacks, calculating node-level
attack advantages and spreading weighted privacy risks, and evaluating and visualizing a
privacy protection effect. Under the same global privacy budget, the effective
noise variance needing to be superposed is lower than that of an independent
Gaussian noise scheme, so that the model training stability can still be maintained in a strong privacy scene.