The author Zhiqiang Ruan has plagiarized parts of a paper that had already appeared in IEEE Transactions on Information Forensics and Security in 2017 titled"Security of Cached Content in NDN."vol.12,no.12,pp.2933-2944,DOI:10.1109/TIFS.2017.2725229.Upon request of original authors,Tech Science Press conducted an institutional investigation which confirmed the misconduct.During the investigation,the corresponding author Zhiqiang Ruan also declared that he submitted the paper without knowledge and permission of Haibo Luo,Wenzhong Lin and Jie Wang in the author list.