Ussatova, O., Makilenov, S., Mukaddas, A., Amanzholova, S., Begimbayeva, Y. and Ussatov, N. (2023) “Enhancing healthcare data security: a two-step authentication scheme with cloud technology and blockchain”, Eastern-European Journal of Enterprise Technologies, 6(2 (126), pp. 6–16. doi: 10.15587/1729-4061.2023.289325.