Immaniar, D., Azizah, N. , Supriyanti, D. , Septiani, N. and Hardini, M. 2021. PoTS: Proof of Tunnel Signature for Certificate Based on Blockchain Technology. International Journal of Cyber ​​and IT Service Management (IJCITSM). 1, 1 (May 2021), 101–114. DOI:https://doi.org/10.34306/ijcitsm.v1i1.28.