selected publications academic article A Novel Approach for Hiding Sensitive Association Rules using DPQR Strategy in Recommendation Systems. International Journal of Intelligent Computing and Information Sciences. 20:30-40. 2020 chapter Adopting Non-linear Programming to Select Optimum Privacy Parameters for Multi-parameters Perturbation Algorithm for Data Privacy Improvement in Recommender Systems. Advances in Intelligent Systems and Computing. 603-613. 2019 conference paper Privacy preserving recommender system based on improved MASK and query restriction 2017