The current data assured deletion effect is influenced by many factors,which hinders objec-tive evaluation.Aiming at the problem,a method to determine the weight was proposed based on en-tropy weight method-analytic hierarchy process-random forest(EWM-AHP-RF),and it was com-bined with the improved grey relational model to evaluate the assured deletion effect of cloud data.The method firstly constructed an evaluation index system of deletion effect,and then combined the entropy weight method with the analytic hierarchy process,determined the combined weights of the indexes,and updated the weights based on the random forest method.Finally,the deletion effect of the cloud data assured deletion scheme was evaluated based on the improved grey relational evaluation model.The results show that the proposed method is scientific and effective.
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