I want to know if the below algorithm , secure against quantum computing attack, and how I can compute the running time for the original algorithm and the proposed attack
Source: Yan Zhu, HuaiXi Wang, ZeXing Hu, Gail-Joon Ahn & HongXin Hu, Zero-knowledge proofs of retrievability, in Sci. China Inf. Sci. 54, 1608 (2011).