Abstract: Mimic defense technology is an effective means to solve the easy to attack but difficult to defend situation in existing network environment.Mimic defense technology builds a safe and reliable system by improving the dynamics,heterogeneity and randomness of the system.The scheduling of heterogeneous executive bodies is the key link of mimic defense.Existing scheduling algorithms lack of situational awareness and can only schedule the executor according to the existing strategy,which has the problem of poor applicability.For this reason,DCOE,a scheduling algorithm based on the comprehensive defense capability of the executive body is proposed.Based on the classic traffic monitoring algorithm,DCOE identifies the threat type and threat level of the current traffic,and dynamically adjusts the types and numbers of heterogeneous executives according to the defense capabilities of each executive against the current traffic.Simulation experiments show that,the DCOE algorithm can reduce the failure rate and escape rate of the system on the basis of reducing the number of scheduling heterogeneous executives,that is,improve the overall defense level of the system on the premise of reducing the system overhead,and increase the difficulty of the adversary’s attack.

Key words: Mimic defense, Heterogeneous executor, Scheduling algorithm, Executor defense ability, Simulation