Tummalapalli, Siva Rama Krishna, and A.S.N. Chakravarthy. “Multi-Level and Mutual Log Integrity Preservation Approach for Cloud Forensics Using Public Key Infrastructure”. International Journal of Scientific Research in Network Security and Communication, vol. 9, no. 1, Feb. 2021, pp. 8-16, https://ijsrnsc.org/index.php/j/article/view/215.