Assembly of reconfigurable security protocol remains a major challenge for deploying higher security-level but more complicated security strategies in access points with limited resources and computing abilities. To handle this problem commendably, a hierarchically collaborative ant colony-based assembly algorithm was proposed. This algorithm decomposed the security protocol assembly problem into assembling directions controlling sub-task and cryptographic components selection sub-task. Directions control generated assembly subgoals and cryptographic components selection schedules the bestfitted components for given sub-goals. Both sub-tasks adopted a modified version of ant colony algorithm to fulfil its targets. These two ant colony algorithms generate a candidate optimal solution collaboratively for the assembly problem. And a hierarchical pheromone was defined to reinforce positive behaviors of ant colony. Additionally, a Lévy theory based stochastic gradient algorithm was adopted to verify and reoptimize the optimal solution. Experiment results suggest that the proposed algorithm outperforms baseline algorithms in convergence and performance.
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