Lin, Jyh-Shyan, Kuo-Hsiung Liao, and Chao-Hsing Hsu. 2014. “A Group Collaboratable Proof of Retrievability Scheme for Cloud Data Storage”. INTERNATIONAL JOURNAL OF COMPUTERS &Amp; TECHNOLOGY 13 (7):4625-32. https://doi.org/10.24297/ijct.v13i7.2501.