From the real network attack-defense

aimed at the multi-stage and dynamic attack-defense process with the restriction of incomplete information

the multi-stage attack-defense signaling game model is proposed in the paper.Considering attenuation of the signal effect in the multi-stage attack and defense

signal attenuation factor is proposed for the quantification of attenuation.Based on the above

we design the solution for game equilibrium in multi-stage attack and defense.Then the algorithm of optimal active defense strategies selection is proposed.Finally

a simulation experiment is conducted to verify the effectiveness of the model and method proposed in the paper

through which some rules in the multi-stage attack-defense game are concluded.